Yes, the diffuse map belongs in the color channel. As far as I know, there is unfortunately no direct way in C4D to use the specularity map as originally intended since the strength/size of the specular highlight is not directly controllable by a map.
I have no experiences with C4D myself. Maybe some other visitor here could point out a work-around?
Yes, the diffuse map belongs
Yes, the diffuse map belongs in the color channel. As far as I know, there is unfortunately no direct way in C4D to use the specularity map as originally intended since the strength/size of the specular highlight is not directly controllable by a map.
I have no experiences with C4D myself. Maybe some other visitor here could point out a work-around?