Render Light Volume for spotlights

Anyone having an idea of how to render light volumes, like a cone from a spotlight in fog?

I know this is a “hard” problem in rendering but does anyone have some ideas on how to achieve it?

Uh, either you have something you can “reflect” on like snowflakes or something or you go basically for the light scattering effect locally.

There can be a mix of alpha and additive materials.

Some tips:

  • Have a look at FakeParticleBlow shader (alphas)
  • Try to use Fresnel falloff for Cylinder
  • Try to use camera view and object angle for appear/disappear some perts of the effect.
  • Try some experiments with simple alpha material and additive material.