SOLVED How to create a layer Reflection (Legacy) ?

Hi

I created a material.
I inserted a texture into the COLOR channel.
Then, I inserted another texture into the BUMP channel.

Now, I want to insert a texture for the specularity, but I don't know how to create a Layer Reflection (Legacy)
I only activated the REFLECTANCE channel with the following code:

mat [c4d.MATERIAL_USE_REFLECTION] = True

Then I want to apply the following values for this layer:

0.5 for REFLECTION_LAYER_MAIN_VALUE_ROUGHNESS
1.0 for REFLECTION_LAYER_MAIN_VALUE_REFLECTION
0.2 for REFLECTION_LAYER_MAIN_VALUE_SPECULAR
1.0 for REFLECTION_LAYER_MAIN_VALUE_BUMP

I suppose that these values must be prefixed by the variable 'mat' which represents the material and also by the id of the layer.

I found the solution to my problem, on the internet, with code samples:
https://www.c4dcafe.com/ipb/forums/topic/101805-materials-and-shaders-with-python/

I found the solution to my problem, on the internet, with code samples:
https://www.c4dcafe.com/ipb/forums/topic/101805-materials-and-shaders-with-python/