i had this problem for ages, but it seems nobody else.
now i found a solution. At least in the universal material control the metallness with an extra node (float, image, … ). Then the function “solo texture” also works in metall materials for roughness,. bump, and so on.
Cinema 4D R23, Octane 2020.1.5-R4
![](https://stefaneder.at/wp-content/uploads/2021/01/Screenshot-2021-01-27-094810.jpg)