This converts the "Layer Adjustments" from GPv2 into modifier setups in GPv3.
They include:
* Layer tint
* Layer thickness offset
* Thickness factor (for the entire object)
Both the "layer tint" and the "thickness factor" are converted using the existing modifiers.
Because the thickness modifier uses a factor instead of an offset, the "layer thickness offset" is converted to a geometry nodes modifier setup for each layer that adds an offset value to the radii instead of multiplying by a factor.
Pull Request: https://projects.blender.org/blender/blender/pulls/118149
8bca19ed12