I am very new to Cinema4D and having trouble with the preview showing up when I open the material editor. Forgive me if a newbie question. Under the Reflectance tab there should be a preview under Default specular, but all i have is a grey box with red outline. I've messed with all the settings I thought possible.
When I start a new project it works fine and I get the sphere preview, only in my current project it goes grey. I even copied the project to a new project and the same thing occurred. Please let me know if anyone can help! Much appreciated->