It depends on what you mean by "All". All materials for a figure/prop, or all materials in the whole scene? You could try changing GLOSSY_DIFFUSE_RATIO to 1 in OctaneDefaults.py, or rendering in Colored Clay mode (available in the next release), or set the Poser Material Specular_Value to 0 for all materials prior to converting to Octane materials, or change one material to diffuse and copy/paste is to all other materials.is there a way to set all node to diffuse at once. Or do i have to do them one by one.
Paul