question

saad moosajee avatar image
saad moosajee asked ·

toon shader Alpha Channel

Hi,

I'm trying to do something very simple but have somehow been unsuccessful in doing so.

I need to render an object from C4DtoA that has a toon shader on transparent (no black bg) so I can use composite things over and underneath it.

Somehow every time I try to do this, I'm only able to render the outline, and not the whole objects alpha. I downloaded the Arnold toon shader demo file and rendered that (its set up to render multi-pass out of C4D) and even that file only gives me the outline, not the full alpha.

Very difficult becaues I can't composite anything, any help would be hugely appreciated!

toonalpha for geometrytransparent
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Justin Crowell avatar image
Justin Crowell answered ·

Any chance this has been updated? It's so frustrating and confusing to use. I want to use the contour filter in my IPR window and have that not affect my exports. I'm struggling to get the alpha channel to work properly, as well.

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Sorry, no updates on this, the preferred workflow is still creating a custom AOV with the contour filter.

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Peter Horvath avatar image
Peter Horvath answered ·

Check out this scene: toon-separate-edges.zip

The default filter in the render settings is set to box_filter. The custom AOV, called 'edges', uses a custom contour_filter.

I also added this scene to the docs.


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Ste Pha avatar image
Ste Pha answered ·

@Peter Horvath Is there a chance than you can explain better how do that, the documentation says the minimum and is very difficult to understand for a beginner (i read the whole AOV and Toon documentation and i still can't get what OP Saad is asking).

I only get multiple AOV with Toon lines, no shaders.
Also i dont get how you can have a Contour filter for and AOV and a Box filter for another on the same file and same render.

maybe a little step by step would be really great in your documentation.

Thank you.

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@Ste Pha Please post a new question. Please don't post your new question as an answer to another question.

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Peter Horvath avatar image
Peter Horvath answered ·

Unfortunately there's a technical limitation to dispaly the full alpha at the moment. What you can do is to create a custom AOV for the edges, as described here:

https://support.solidangle.com/pages/viewpage.action?pageId=71008418

We're trying to simplify this in a future release.

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