Currently, we don't support rotation of UV coordinates in Arnold materials, since the order in which scale, translation and rotation is applied in CityEngine seems to be different than the order applied in the aiUvTransform shaders used in Arnold materials.

Task:

• Implement support for rotation of UV coordinates.

Ideas:

• aiUvTransform could be replace by or combined with place2dtexture
• chain multiple aiUvTransform to enforce the order in which scale, translation and rotation is applied