Changes to support volumetric scattering and filtering.
Fixed: previously collected filter colors were not being taken into account when adding ambient colors.
Send signals to the rendering thread to reset, etc instead of doing it from the UI thread.
Trying to fix scattering, but it's still a bit wrong.
Fixed scatter distance calculation?
Explanatory text about distance calculation.
Messin.
Ghhfrrmm
Wimp out when starting directly at a node boundary, remove unused root size variables, and the root node no longer needs to be a cube.
New scene.