rafal

This popped up again recently so I re-did the example using an HDA as jsmack suggested.

It's probably because you used "-n switch_20" on the command line. I think the MaterialX shader name is derived from the HDA name.

You can change the shader name in the HDA Op Type Properties in Houdini (RMB > Edit Operator Type). In the inputs/outputs there is a shader name for each signature. You can change that to an arbitrary shader name.

MaterailX shader nodes have only inputs, thus only VOP node inputs get translated to materialx. However, your channel reference approach (to the 'blend_mode' top parameter) should work, since ultimately you are setting a value on a MaterialX shader input.

As for the color-space value, in MaterialX, they are authored as an attribute of the input element. But `vop2mtlx.py` might not be handling them properly. It, it may be a bug/limitation of that script.