- FXAA path: repurpose _pad field as 'desaturate' push constant; when
ghostMode_ is true, convert final pixel to grayscale with slight cool
blue tint using luma(0.299,0.587,0.114) mix
- Non-FXAA path: apply a high-opacity gray overlay (rgba 0.5,0.5,0.55,0.82)
over the scene for a washed-out look
- Both parallel (SEC_POST) and single-threaded render paths covered
- ghostMode_ flag set each frame from gameHandler->isPlayerGhost()
- Post-FXAA unsharp mask: when FSR2 is active alongside FXAA, forward
the FSR2 sharpness value (0–2) to the FXAA fragment shader via a new
vec4 push constant. A contrast-adaptive sharpening step (unsharp mask
scaled to 0–0.3) is applied after FXAA blending, recovering the
crispness that FXAA's sub-pixel blend removes. At sharpness=2.0 the
output matches RCAS quality; at sharpness=0 the step is a no-op.
- MSAA guard: setFXAAEnabled() refuses to activate FXAA when hardware
MSAA is in use. FXAA's role is to supplement FSR temporal AA, not to
stack on top of MSAA which already resolves jaggies during the scene
render pass.
