Mesh lights

Guerilla can use any polygonal object as a light source. It becomes then a mesh light.

The mesh lights are carefully sampled and generate less noise than the emissive objects. In turn, a large number of mesh lights may slow down the renderer.

An emissive teapot, the same teapot turned into a mesh light.

Turn a polygon object into a mesh light

1. Select the object to turn into a mesh light.
2. Use the command Modify > Mesh Light > Set as Mesh Light

Turn back a mesh light into a polygon object

1. Select the mesh light to turn back into an object.
2. Use the command Modify > Mesh Light > Unset as Light

Turn a polygon object into a mesh light using the RenderGraph

1. Add a LightAttributes node in the object flow.
2. Force Light > On to checked.
3. Force Light > Light Set and Light > Shadow Set to Lights and Shadows.

You can use different values for the light and shadow sets, just make sure these values are overriden in the RenderGraph.