Black hole with FG contribution.

Black holes are a key feature in 3D lighting and compositing, but black holes with bounced information are super!

- Apply a Mental Ray Production Shader called "mip_rayswitch_advanced" to your black hole object.

- In the "eye" channel, connect a "surface shader" with the "out_matte_opacity" parameter pure black.

- In the Final Gather input, connect the original shader of your object. (a blinn shader for example)

Beauty pass.

Alpha channel.

Download sample scene.