Vray Light Material or Vray Light?

[AC5L4T3R]

Always wondered what the best way to recreate car lights is. Personally I create a light mesh from the geometry where others use vray light material. I always feel like using Vray Lights is more accurate but I don't know what goes on under the hood when it comes to rendering. If anyone could shed some light (ho ho) that'd be nice.

Cheers

[^Lele^]

There should be no difference in speed or quality between a lightMaterial emitting direct light, and a geometric light.

[AC5L4T3R]

Ok thanks. I think using a geometric light is better in terms of being able to use light select passes and a few other options.

[raymarcher]

Does one of both overule the other in case one has assigned a light material to a mesh used as mesh light?

[^Lele^]

the mesh light will take the input mesh only, discarding whatever material was on it when picked.