Problems on Toon shading

[Anonymous]

Hi! I'm working on a toon character for a school project (Maya 2018), and my professor suggested me to render it on Maya Hardware rather than Arnold because of the pre-made Toon Shaders and Outlines, and because Arnold is overkill for this kind of work.

My problem is that I cannot make Maya Hardware work with toon shading.

I have three 4K diffuse textures for my model, using UDIM tiling.

This is the result with Maya Hardware 2.0, a Shaded Brightness Toon shader and just a directional light.
I plugged the textures to the lightest color of the ramp, and I selected the UDIM tiling mode (three tiles found, so this is fine), but as you can see they are not correctly rendered. 

If I try to render this using Maya Software instead, Maya crashes during the process.

On the other hand, if I use a random image from my Hard Drive as a texture (a 1440x1080 .jpg file, UV tiling mode off), the result is the same for Maya Hardware, but this time Maya software works correctly:

Finally, here there are the UVs, the textures and a quick rendering on Arnold 5 (AiStandardSurface, just the diffuse plugged-in), as you can see everything should work properly.

 

I really cannot figure out where the problem is, am I missing something? I wonder if UDIM tiling is supported by Maya Hardware/Software, or maybe my textures are too big..
Thank you in advance.

[Anonymous]

up

[townsendkenzie]

What I noticed when using Toon shader. Albeit, this is an old post. Maya Hardware 2.0 does render 2 and 3 color ramps from the Toon submenu. But, not from the Node Editor using the GPU.

Sometimes, switching from Gaussian to Contour doesn't render with errors towards the texture file when using Arnold Render on GPU. Switching to CPU with Arnold I get a render with or without toon outlines. 

So. In short, its very. It seems overly complex for what's supposed to be a quick view of a game engine toon shader. 

If you want your texture mixed it has to be inputted into the color portion. That part seemed to work pretty consistently with my objects using only 2k textures. Even rigged objects. 

I'm just putting this here in case someone else attempts to go down the rabbit hole of the internet with Arnold toon shaders.