No Alpha channel

[lucasridley]

My scene does not render an alpha, in arnold preview, as exr, batch render, nothing.

In a brand new scene with just a sphere I can get an alpha, so there's something about this scene I've been working on...

So I reverted back to the first version of the scene and it too will not render an alpha channel. Anyone else ran across this? I've tried everything I know (render setting has alpha channel checked, I've removed all AOVs I had, reassigned Lambert1, I've made a basic cube just like I would do in a fresh scene).

No idea what to try now or how this occurred

[Stephen.Blair]

Please upload a simplified scene

[lucasridley]

https://drive.google.com/file/d/1_jRDbncXm4u_K5gXfuMneyuNN6BMXzzC/view?usp=sharin

[Stephen.Blair]

The scene is using the contour filter. When you use the contour filter, you won't get anything in the alpha except toon edges.

[lucasridley]

Thanks for taking a look! I am not familiar with that. Where is that located, how do I turn that off?

[Stephen.Blair]

@Lucas Ridley In the Render Settings, on the Arnold Renderer tab, in the Filter section.