really glad to hear it was helpful and thank you for the feedback.

Really glad that this was helpful for you but sorry to hear you have had such a late night :)

Thanks for the feedback. It is always nice to hear if a video has been helpful!

Really glad it helped and thanks for the feedback.

Very pleased to hear it was useful. Thanks for letting me know.

Thanks for the feedback. Glad this was helpful.

Exactly my same thoughts! PLUS @notverygoodguy : I appreciate the subtle humour! Keep doing this man, you rock!

@@svetlio3d Thankyou :) I have been a bit lazy of late but will get back to them soon.

@@svetlio3d i think the humor is very obtuse

It's a bit specific isn't it :)

Glad to have helped!

Very glad the video was useful for you. With regard to the shrinkwrap modifier I think you are right but when I was learning Blender and trying to do retopology everyone recommended having both and I never really thought about it after that :)

Glad to hear that! Thanks for the feedback

Thank you. I hope to make these tutorials easy to follow but sometimes miss out bits. I am glad this was useful for you and thank you for the feedback.

Very glad this was useful for you. Yes, I am British.

@@notverygoodguy tysm

Thanks for the feedback. I have very pleased this was helpful for you.

Very glad to hear that and thanks for the feedback.

Glad to hear it :) The thing I don't like is you do lose 0.001 units of your model but I think I can live with that.

@@notverygoodguy to be honest the glue will fill that

Fantastic! Glad it helped and thanks for the feedback.

@@notverygoodguyFar quicker and neater than deleting Vertices. I'm just learning Blender. Is there any way to save a singular stl, without it also saving other bits that you have open?

@@ATOMTAYLOR Yes, just select the objects you need and then when you export to STL check the "Selection Only" check box (which may be hiding under the "Include" option) on the top right of the export options.

@@notverygoodguy Ta ;)

Thanks and good lick with your new build. Let me know if you have any issues!

Thank you for the feedback. Glad you liked it.

Let me know how you get on :)

Keys are shown bottom left above the little white mouse icon. I admit it should be bigger and in more recent videos it is!

Good to hear! Thanks

Thank you. I am glad this was helpful. I have more videos planned but am sadly, just a bit slow :)

Glad you like it!

So glad it was helpful for you! Thanks for the feedback.

Appreciate the feedback. Thanks.

Thank you so much for your feedback. I have new videos lined up but I am a bit slow :)

So glad it was useful and thank you for taking the time to comment.

Thanks for the feedback.

This can work if you use separate mask to new object but getting the mask precise enough is extremely difficult and you have no control over the shape of the cut line so I think using a cutting object like this is quicker and more accurate.

Thank you :)

Thanks. Carver is a really, really nice add on but unless you use it a lot I think it's probably easier to just use a boolean. It is for me at least.

Thank you for the feedback! I am very pleased it was helpful!

Thank you. I am very glad it was helpful.

Glad it was helpful :)

And a happy new year to you too!

This is odd. After the e for extrude you are supposed to do the s for scale. Are you doing that?

@@notverygoodguy I press e to extrude, then move the cursor around which extrudes all the vertices in a single direction. I've tried hitting s but it doesn't seem to do anything as long as extrude is active?

@@p4cca Don't move the mouse until after the s. Press e and then press s and then move the mouse. Should work :)

@@notverygoodguy I'm so glad you already answered this in the comments! Trying this tutorial and that's where I got lost! Thank you!

I am very pleased to hear that. Thank you for the feedback.

Your method will be really difficult with high resolution models, especially stl ones but if it is working for you that's great. I am interested in the issues you are having using this method though. Can you give more details on the kind of failures you are getting?

Are you able to provide more details. I'm not sure if your problem is with the "cutting" tool or with the second half of your model.

I figured out I have manifold edges so the Boolean won’t work. Thanks for the help!

Great to hear :) Thanks for the comment.

Ahh, if only that were true :)

Thank you. I am glad it was helpful.

It's always nice to hear if a video was useful. Thanks

Because the bisect tool can only handle a straight line. This technique allows any shape cutting tool and also allows you to adjust it until its just right. Bisect tool is fine for quick rough cuts though.

Any chance you could provide a link to the file you are trying to work with. I can take a look.

Glad it was helpful.

Glad you liked it!

Could it be that your starting model is actually hollow? If so you could try this method to cut and key a hollow model kzfaq.info/get/bejne/e6qoYK-jmLfImnk.html If this isn't the problem, first try the method on a simple object like the monkey that comes as a mesh with blender or see if you can find a way to provide a link to your model and I'll have a look.

This works but only for a straight cut on a not too dense model. You can't use the bisect tool to cut around an object such as we do cutting off the leg here. In a dense model, selecting the outside loop to create a face can also be a bit challenging. It does work in many cases though so is certainly an option.

And thank you for the feedback.

So sorry it took me so long to see this. I usually reply to all messages within a day but I wasn't messaged about this one. Thank you very much for your kind donation. It is very much appreciated.

CTRL+J only makes two objects into one object. It doesn't change anything at all. The objects don't even need to be touching each other. A boolean union will merge two intersecting objects together and attempt to remove any walls that end up being inside.

Thank you :)

ahh ok it's probably because of overlapping faces.

@@its3amagain. Always great when people solve the problem themselves :) Nicely done!

I'm not entirely sure I understand. However, remember to turn on "face orientation" to make sure you have no flipped normals. Check the normals on your model AND the cutting tool you are using for the boolean. Next thing to check is that you have applied rotation and scale on your model and your cutting tool too. Last thing that occurs to me. Make sure your cutting tool is big enough to extend beyond all the edges of your model. If you still have problems, let me know.,

I am very glad it is helpful.

oh! now i noticed that one arm of the model actually touched the other half......😑

@@eddiexx That can happen :) Well done for spotting this yourself!

Just tried this myself on Blender 3.6.0 and it worked OK. What problem are you seeing?

Still battling to get my audio right :(

@@notverygoodguy its okay.. btw very helpful video keep making and helping ❣️

I presume you have created the single vertex as the starting point and you can see that in the list of objects in the outliner (the window in the top right that has all your object names in it and you are in Edit mode when you are doing the extruding? The single vertex (made from a cube) must be created in Object mode and the single vertex extruded in Edit mode. I hope that helps. Let me know. By the way, love your work!

​@@notverygoodguy I've realised I wasn't Pressing "E" for every movement. Thanks very much for your kind words and speedy reply!

You make a reasonable point and your mostly right. Try it though, it usually works out better with both.

It would be easier to see pictures somehow as there are a million ways you might have got to the point you are at. However, something that could work where ever you are at is to create a solid cylinder just slightly bigger than your hose inner wall and do a boolean difference between it and the hose. It should remove stuff but to be honest maybe there was a way you could have got where you are without having the problem you are left with. I would be interested to see what you have if possible. There is a Blender for 3d printing facebook group linked at the top of this channel and you can post pictures in there if you like but anywhere will do if you wish. I also create dust extractors for various wood working tools :)

Maybe this will help. Fiirst shows how to do the same if your model is hollow kzfaq.info/get/bejne/e6qoYK-jmLfImnk.html and this one just makes a hollow model solid again kzfaq.info/get/bejne/bZORiMV43J63qmg.html Hope these help.

@@notverygoodguy my model has only outside wall

@@B612Dansmanlk Do you have a link to your blend file I could look at?

Thank you for the kind words. I kind of had resin printing in mind actually and then you would most likely have supports on anyway but if you are using an FDM printer I would suggest you make sure the gab between the hole and the "key" is bigger than I show in this video. I would think 0.2mm as a minimum otherwise the parts might not fit together. For supports, if you use the cube key as it is and it's walls are not at a 45 degree angle to the printer bed then yes you might need support. However, it doesn't have to be a cube :) If you selected the vertices of one face and scaled them down, you could make a kind of wedge shape for both the hole and the key and if the angle is right you may not need supports. Hope this helps!

Thanks!

Your model has shape keys and blender won't let you apply a boolean modifier if a model has shape keys. You CAN delete all your shape keys first but it might not work out as you would like. As long as you don't save until you are happy that will be fine. You may find delete all shapekeys works or start at the top of the shape key list and delete one at a time might be better. You may need to make a new shape key from mix and to start with. If you are not sure about shapekeys, let me know and I'll explain how to proceed,

Without having seen your model most cars I have seen are not made for 3d printing and have multiple objects, inverted normals, no manifold parts and a whole host of things that booleans might not work with. There will likely be a fair bit of work fixing up if this is the case. You MIGHT try using the 3dprint plugin on the individual objects as it has a make manifold option but I am not especially confident in this. I hope you are able to get this sorted!

No problem. Hope it was useful!

All cubes are hollow inside, actually everything is really so I wonder if perhaps your issue is something else. Would be interesting to see a picture of the result you are getting. Is it possible that the difference has worked but you still have the "cutting" cube showing in your viewport? If so, just selecting it and turning off the visibility in the list of objects would work. You could also try just moving out of the way to check if you liked. Otherwise perhaps you can give a few more details of your issue.

Did you remember to apply the boolean first?

Good to hear! Thanks for the feedback

So disappointing to get this far. I'm going to have to bail. No key I hit does anything. I guess Blender updated and changed how this works? Who knows

Sorry it took so long to see this message. I usually get to them quickly. Actually, face nearest is probably best but it depends on the size of your faces and vertex can be better.

Two things that come to mind though I am not overly confident of either of them. Firstly are you sure your cutting plane cuts entirely through the model in all direction? Secondly, you could try a thicker cutting plane, I would be tempted to try it with a stupidly thick one and then turn it off in the viewport to see what the resulting boolean difference looks like. If it doesn't cut it, there is something odd with the models. You might also try the "Fast" option instead of "Exact" when you do the boolean as that sometimes helps. Other than that, make sure your normals are correct in both the model and your cutting tool (check "Face orientation" in the viewport overlays drop down menu). There should be no red faces. The try applying rotation and scale to both objects and as a last resort make sure that the origin is set to geometry (though it often works without this). Let me know if this helps. If not, I'd be interested to look at your blend file somehow.

I want to thank you for replying to a comment on a video you did a year ago! I thought it was a longshot that you would reply so you've definitely gained a sub from me. And i switched the boolean to fast and it worked!

@@kaininquattrocchi339 Thanks for the kind words and the sub. I am a bit slow doing videos at the moment but will get into it again soon :) Glad to hear your cutting is now working :)

@@notverygoodguy im having the same problem so tried changing the setting to fast but it still didn't work

@@Fakob225 Are you sure you have applied scale and rotation to both the model and the "cutting" plane before using using the boolean?

I am not sure I understand your question. If you have a posed model of a man and you want it to sit on a horse, you'd normally just put it on the horse. You wouldn't need a boolean at all. However, if you are hoping that your man deforms around the shape of the horse, booleans are not that smart sadly. You would need to model or sculpt the man to fit properly on the horse yourself. Of course I may have misunderstood your issue,

Depends on your printer really though it probably is a bit too small. Especially as scaling by 1mm only gives 0.5m clearance all around. It might work for resin printing but yes, I guess 2 or maybe 2.5 would be better.

To be honest I haven't tried Blender 4.x mostly because charmorph doesn't work with it yet but my first suggestion would be to try "fast" in the boolean operator instead of "Exact". That often fixes things. If not then check normals by turning on face orientation in the viewport overlays drop down. If this doesn't make a difference then it looks like I am going to have to download 4.0.1 even though charmorph doesn't work with it so I'd be grateful if you could let me know how you get on.

Thanks for the fast reply. Gunna try these as soon as i get home. Thank youuu

@@notverygoodguyOKAY so im home and so far i tried the one using the Plane and it worked after I used Fast Though. Edit: yep ive tried from start to finish a few times and the organic cut doesnt work. The only thing ive notice is when Solidify is set on a plane. I notice its thickness increasing. On the organic it still looks flat. Im gunna play with thickness and see what i get. Important edit. So in my case making the thickness .003 worked. Im not sure why thats the case but i was able to get them apart

@@Linkophere Thanks for the updates. I'll download 4.0.1 soon and see if there any weird new things I should know but I am glad you got this working :)

@@notverygoodguyno problem. Thank you very much for your fast replies and help. Youve saved me from literal days of editing meshes to make a key hole. This is only my 3rd day of using blender and this video was amazing.

This is most likely to be due to not applying the scale. Sometimes it isn't necessary but sometimes it will do what you experience. Try applying the scale to both the model and your cutting plane. The other, less likely issue is that you have a non manifold model or the normal are wrong. The first can be checked by enabling the 3dprint add on and getting it to check, the second by turning on face orientation. Alternatively, you could provide a link to your model and I'll take a look at it :)

This method is for cutting up finished models to be ready for printing, It won't cut bones in half but then why would you want to. If you have a model that has rigs and textures and possibly shape keys, export it as an stl first and then use that stl to cut up.

Are you able to give more details about your issues with this. It should work all the time. Perhaps you can provide a blend file of one that isn't working I can look at?

You maybe surprised :) Ignore the slicing part of the video but just do the part cutting and keying part with the cube. Alternatively if you use Prusaslicer as your slicer it can now add connectors to parts to allow you to snap them together. I haven't actually tried that yet though.

Have you set a target for the boolean? This error usually means that the modifier doesn't have enough information to work or has options that can't work.

Yes after selecting the correct target I was able to cut it. Thanks so much for the help and awesome tutorial!

@@disposable40mm Glad to hear its working now!

If anyone finds this and is having the same issue. I went to Edit Mode -> Mesh -> Normals -> Recalculate outside and that seemed to work for me

@@jon5716 You didn't even give me the chance to reply before you solved it yourself :) Indeed, normals being wrong is the source for many a Blender problem. That is why I always have Face Orientation set to on in the Overlays dropdown but change the blue to transparent in preferences. Glad you solved it :)

@@notverygoodguy Okay so I am having the same issue but this time recalculating normals isn't fixing it. I have an object imbedded in another both have their normals correct but if I do a union it leaves a hole. If I switch to difference it leaves a indent. Using self intersect also doesn't seem to be working. I am stumped. To clarify I am trying to join these two objects now. Having the same issue with the hole but the end goal is for them to be one

@@jon5716 Try switching from exact to fast in the boolean modifier. That can often fix issues like this. When I finally get around to it, my next video will be about boolean problems and this is one thing I will talk about.

@@notverygoodguy Good to know thank you. It turns out this one was because there was non manifold geometry. I downloaded the 3d Print addon and the fix that provides has been really helpful getting booleans to work properly

dude idk but exporting the stl and then reloading fixed it

I am guessing that the most likely reason for your issue was either that you missed the step of applying scale and rotation or you had some normals that were facing the wrong way. Bad normals are the root of so many evils in Blender :) I see you have resolved the issue by exporting and re-importing but if you want to know how to check for bad normals then you could check this short video kzfaq.info/get/bejne/iLiKm5Zqld_Tj4E.html

Well that's a interesting project especially given you have to stick the pieces together well once printed. You don't want that flying apart in mid air. It depends how big you want this thing to be but you might consider using a cylinder with the top and bottom faces removed as your cutting "plane" and use it to cut out the center leaving that and the arc of the blades as separate object. Creating keys in something that thin may be a challenge though. It would be interesting to see what you come up with.

@@notverygoodguy I did approach it a bit diff than you, tried to cut it in 3 parts 120deg in vertical plane, but I failed due to not being good with the soatware.

@@geopolska Did you look at the later parts of the video about making organic cuts? It MIGHT be helpful. The basic idea is the same with you propeller as the dog :) You should be OK.

@@notverygoodguy Need to study software for a bit longer then, haha

@@geopolska I believe in you :)

How about you just place the pieces together in Blender do a boolean union on each part so they all end up as one model with the keying still inside. Your slicer would probably ignore what is inside but if it doesn't , go into edit mode, select all of the outside probably with "C" selecting tool and then SHIFT D to duplicate what you have selected. Then "p"->by selected. You should have a new object that is a copy of the old one (as well as the old one) that would be completely solid. I haven't actually tried this of course but it should work. I suspect the slicer will ignore what is inside though so check that first.

Excellent suggestion, Thank You! What I had done so far was to simply import all of the keyed files (they're not hollowed) at once into Blender, and it assembled everything for me automatically (a very nice touch). I suspect that this is because the original keying process was done in Blender, so there might be some lingering metadata associated with the files. I then went to Object Mode / Object / Join and then exported the result as an STL. I haven't printed it yet though, because I was concerned that some of the keyed areas might still have open areas around them (leaving uncured/trapped resin). That's why i was looking for a confirmed method of putting the model back to a fully assembled/solid state. But so far, I've not seen a video walkthrough of anyone performing either of these methods; it's always the opposite. 😄

@@MalsBrownCoat Actually I do have a video about making hollow objects solid again but not ones that are keyed. You might find you may have to do the booleans I suggested because the join command doesn't connect parts together, it only makes them look like they are and makes one object out of the parts. However, it is likely that gap between the parts are so thin that the slicer might handle it anyway. I would be interested to hear how you got on. I have never heard of anyone needing this before but I'll add it to my list of videos to consider doing.

Agreed that the slicer (Lychee) may just take care of things and it may not be an issue after all. I'm supporting the test file and printing as we speak. Will certainly advise on the result. For future use cases though, I'll likely go the route that you mentioned, just to be safe. The extra steps couldn't hurt. And for the record, how I found you was from that hollowed-to-solid video. Thank you for that, as well!

@@MalsBrownCoat Good luck :)

This procedure will work with any pose. Not sure if you got as far into the video as when I show just removing a leg from this dog but basically you just need to create a cutting shape around the part you want to cut and then do the solidify and booleans as described. You can create your cutting shape simply by extruding vertexes around the part you want to cut and then filling in the shape. At around time point 9:00, my previous video (with bad sound) shows another idea for cutting a part off a more complex model. kzfaq.info/get/bejne/eptddK2h37mooqc.html

Interesting question and this could be messy depending on your model. I will need to see if there is a better way for for my test object at least this works. Basically you create a thick plane that sits of the top of the hole and use your hollowed model as a cutting tool to cut into the place. You then remove the bits of the plane you don't need. I will do a video on this I think.

Only 1 month late, but I think you're trying to use the fill tool. Select the vertices on the outside of the hollow area and click the letter F for fill.

@@TheCNCNoob This can certainly work but you can easily end up with a large face that isn't flat. This can make it difficult to add keys and other booleans. In many cases it is a good option though.

Do a bisect instead and use the fill option.

@@Superkuh2 I never had much luck making bi-sect work for me. Maybe I should look at it again. Can it work for a non-plane cut?

Is there something I should know?

Actually he was a very bad boy! grrrr

Select the half you want to export and then export to stl but check the "Selection only" box on the export folder selection window.

@@notverygoodguy Thanks, That sounds easier than deleting one whole side, saving the current side, crtz and deleting the other side lol. Much appreciated! Is there any sort of way to use a pen tablet to draw an organic line around the shape we want to cut out, that you know of?

@@Lexesbenz Blender supports tablets of course and so the easiest way MIGHT be to have a control on the pen set to right mouse click. Then, create a single vertex, and then in edit mode use the pen, CTRL, and the right click button to extrude that vertex to where you want it. You COULD draw a grease pencil line, decimate it and convert it to a mesh or do something similar with a curve but in the end I don't think these are likely worth the effort :)

@@notverygoodguy Ok So I used your method of using vertices to cut a large sword out of a hand on an STL I have. The only problem is when I extrude and scale the vertices they cut into other parts of the model, is there any way to stop that from happening?

@@Lexesbenz Not really, you would just have to be super precise with making your cutting object and move vertices around so it cuts only where you want it to. That includes inside the model too. It will help to turn X-Ray mode on to do this. It is certainly possible to do but it will need some patience.

Presumably you mean as an STL. If so, select the parts you want to save and go File->export-stl and make sure you tick the box to include selection only.

:) Check you have applied scale and rotation for all the objects involved in the boolean. That's usually the issue.

Congratulations!

Yeah I know. Apologies.

@@notverygoodguy No need. Thanks for the video!