I want to set in a standard material the four textures Roughness, Reflection Strength, Specular Strength and Bump Strength in C++. Already working is setting the roughness value with REFLECTION_LAYER_MAIN_VALUE_ROUGHNESS and the Layer Color Brightness texture with REFLECTION_LAYER_COLOR_TEXTURE.
But I can't find the other constants. They are defined in c4d_reflection.h. How to do this?