Maya’s Ai Toon shader renders the cartoon-like image.
This article is an introduction to using Ai Toon shaders.
Rendering Results of Ai Toon Shader
Here is a comparison of rendering results with the Ai Toon shader and the Ai Standard Surface shader.
The left side is the result of applying the Ai Standard Surface and the right side is the result of applying the Ai Toon shader. Both of them are same geometry. How do you think them? The Ai Standard Surface looks realistic and the Ai Toon Shader looks cartoonish.
When I first saw it, I thought it looked like an Americal comic book.
Configure Ai Toon Shader
The Ai Toon shaders are used in the following node structure.
The “PostBodyToon_MAT” is the Ai Toon, and the “aiRampRgb2” is the Ai Ramp Rgb.
Configure the Ai Ramp Rgb
The right of the comparison image shows three reddish colors. This color was generated by Ai Ramp Rgb.
You need to connect the “Out Color” of the Ai Ramp Rgb to the “Base Tonemap” of the Ai Toon. If it is not displayed in the hypershade, do the following.
Set the color to the “Selected Color” of the Ai Ramp Rgb in the attribute editor to display the gradation. 2 to 4 colors would be good. Also, set the Interpolation of each colors to “None” to change the colors tightly.
Draw contour lines
To draw the contour lines on the edges, change the Arnold settings as follows.
The default value of 2.0 for Width is fine.
Adjustment of contour line drawing
How the contour lines are rendered needs to be adjusted by rendering images.
You can adjust them with the “Angle of Threshold” of the “Edge Detection” of the “Ai Toon” in the attribute editor. With the default value 180, none of them were rendered. You should use small value.
The light sources, the position of camera and the resolution of the rendering also affects the rendered result. Trial and error is necessary. For example, the rendering results for each value were as follows.
I was able to make it look like a cartoon but it doesn’t seem to have the cel-look of a cartoon. I think it can be done depending on the settings.
I had heard that 3D was also rendered in animation production, so I tried it, but it was a bit different. Upon further research, it seems that a plug-in called Pencil+ is often used.
Ai Toon can render the cel-look image
I found the following web page.
It seems to depending on the settings. You can find various settings on the following page.
The article explains how to create the cel-look character with Maya
The article explains how to create the cel-look character with Maya is availble in the Autodesk::AREA JAPAN web site.
It using the Unity for rendering not the Arnold.