How to connect Arnold material with MoGraph?

[contactsprky]

I need to make the clones change color after interacting with the Plain Effector. In standard rendering, Octane and Redshift, this can be done using the MoGraph node "Color Shader", or simply by changing the color in the Cloner tab -Transform and Color Remap (but this is not displayed in Arnold) 

[peter_horvath]

Check this post, you can read the color via a user_data_rgb shader.

https://forums.autodesk.com/t5/arnold-for-cinema-4d-forum/is-the-mograph-color-shader-supported-in-c...

[contactsprky]

How to use it? Where to connect it?

[peter_horvath]

It's a shader which returns the color of a clone (specifically the Display Color attribute of the object). You can connect it to the Base color of a standard_surface for instance or wherever you need it.

[contactsprky]

I have the following situation: I applied the material from the userdata_rgb shader to the cloner, and all the clones in the render became black. user_data_rgb was connected directly to Arnold Beauty. There is no Attribute parameter

[peter_horvath]

Attached a simple scene with a Plain Effector showing the shader in action. Maybe your setup is different and does not set the Display Color attribute of the clones. If still does not work for you, please send me your scene and I'll take a look.

[contactsprky]

Even in your scene, the materials are not displayed. I attached my own

[contactsprky · Accepted solution]

I solved the problem by adding user_data_rgba instead of user_data_rgb