There’s a good tutorial on compositing in Cinema 4d at http://www.youtube.com/watch?v=DwPDFMddu1s
I was amazed at how well modeled figures blend in and had to try it with Daz figures. I want to expand it further to work with sibl sets but I’m having trouble making invisible shadow catchers in Cinema 4d. The plane that catches the shadow in the above composite is visible, its just textured frontaly with the room picture. If I can figure out how to make an invisible shadow catcher, complex animations in the sibl environment becomes possible.
3d has changed so much since the 90’s ! C4D is like pliable reality.
Not sure what the “s” stands for in sibl, but I’m guessing the “ibl” stands for Image Based Lighting. In C4D what is the shadow catcher catching? I know in Carrara the shadow catcher works great when not using global illumination or IBL. When using IBL, or GI it “catches” the complex lighting those functions create, causing the object used as a shadowcatcher to become visible. It still retains it’s alpha channel, but picks up a colored hue.
A work around might be to set up a light to mimic the main shadows in the scene, turn off the IBL and render a shadow pass with the shadow catcher (I’m assuming C4D can render different layers). Next, remove or hide the shadowcatcher, render the scene with the IBL. Use the shadow layer to composite in post with the IBL layer.