RendererFX in Camera

[ncannasse]

Sometimes we want to specify some renderer FX for a specific Camera object (example : DistanceBlur or Vignetting, but could be other kind of post processes).

We might want to allow creation + preview of renderer FX inside a Camera in Hide, and it should work directly.

Additionally, we might want to specify :

• a name of another RFX to be inserted before
• a name of another RFX to replace so we don't get double effect