Module pipeline 

GPU post-processing pipeline.

scene FBO (RGBA16F ×2: colour, emission) at render scale
  ├─ emission ─► bloom pyramid: threshold, blur down, tent-filter up
  └─ colour ───┐
               ├─ composite: refraction, lens, exposure, indirect light,
               │             bloom, halation, shafts, flare, flash,
               │             tonemap, grade, vignette, grain, dither
               │      ├─ (fxaa off) ─► screen
               │      └─ (fxaa on)  ─► LDR FBO ─► FXAA ─► screen

The scene targets are half-float. Before this they were eight bits per channel, which meant a scene lit by a few hundred thousand overlapping emissive particles was clipped to white before the composite ever saw it, and the exposure, tonemap and halation were working on a picture that had already lost its highlights. Now the composite is the first place the range is brought down.

Structs

PostFxPipeline