Quick & Easy Alpha Mattes in TouchDesigner

Quick & Easy Alpha Mattes in TouchDesigner - Tutorial

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Күн бұрын

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A common scenario for developers and artists is that you'll receive an asset that you wish had an alpha channel. This might be on a project where the content team sends you an asset that should have an alpha channel but doesn't. Or this could be an asset you have that you want to composite on top of your content. With Channel Mix TOP, you can quickly and easily create an alpha mask from almost any type of content and further process it with Blur TOPs and Threshold TOPs. This is a trick you'll end up using in your daily workflows.

Пікірлер: 13

@LukeHildreth 3 жыл бұрын

Timely as always, I was just dealing with matting this weekend!

@TheInteractiveImmersiveHQ 3 жыл бұрын

Great to hear this was useful :) Matting is always one of those things that happens far more often than we like, so it's good to have these tricks

@dissonantprotean5495 Жыл бұрын

Is there a way to actually draw masks? Something like the polygonal or bezier lasso tools in Photoshop would take a lot of the guesswork out of this. And especially because this approach is simply non-usable if the image contains black.

@roberterdos 3 жыл бұрын

The situation: “OMG we need an alpha channel!” “ALPHA MAN is here at last!” Very useful explanation of the channelmix top, I was always trying all possible matrix outcomes to get a result:))

@TheInteractiveImmersiveHQ 3 жыл бұрын

Hahaha it's so true! That happens all the time. Channel Mix is so powerful but it's not the most intuitive operator the first time you use it.

@DasCartoonLand 3 жыл бұрын

thanks for the tutorial! just wanna note that your intro music is too loud in comparison to your voice :)

@alexbrightlight Ай бұрын

Is there a way to do this for an image with a white background?

@TheInteractiveImmersiveHQ Ай бұрын

Yes! However, you will have to make a slight change to the approach. Add a Level TOP prior to the Channel Mix TOP and set the Invert parameter value to 1. This will invert the white areas to black, allowing you to use the Channel Mix and Threshold TOPs to process the image. Hope that helps!

@sanjacobs6261 Жыл бұрын

This is called a luma matte, since you're basing it off the luminance of the original image

@TheInteractiveImmersiveHQ Жыл бұрын

Yes there’s many different ways to approach this (for example you could use a Matte TOP to look at the alpha channel of a matte texture and achieve a similar result). For a lot of beginners that don’t know the difference, they often search for keywords like alpha matte so we’re talking to a lot of those folks

@redorchidee1372 Жыл бұрын

That intro was more like a sonar ping than anything, almost blew my ears out. All good though

@TheInteractiveImmersiveHQ Жыл бұрын

We've worked on making the intro a bit more relaxed in the newer videos :)

@redorchidee1372 Жыл бұрын

@@TheInteractiveImmersiveHQ No worries, i might've just have had my volume up way too high because of listening to a quiet video, now that i hear it again it's not that bad. Still a bit loud though