Been playing with the volumetric scatter node (especially the anisotropic setting) over the past few hours and came up with an interesting application. Cats eyes.
If you set the anisotropic setting negative (say -1) - it backscatters the light back in the direction of the light source - just like a retro reflector does.
I’m currently rendering an animation to show the effect better.
I created a sphere with a glass node in the surface slot and a volumetric scatter node in the volume slot - set the anisotropy to -1. I applied a HRD environment light to the scene and turned MIS on. The first image the camera is offset relative to the light source (the sun in this instance). The second has the camera position moved so that the sun is directly behind the camera.
