MSAA (Multisample AA)

MSAA (Multisample Antialiasing) is a standard hardware-level (GPU) antialiasing technique that multi-samples polygon edges to produce smooth outlines.

1. Pros & Cons

• Pros:
  • Cleanly smooths actual geometry (polygon) outlines without the slight blur of post-processing filters (FXAA) or temporal ghosting (TAA).
• Cons:
  • Does Not Resolve Internal Aliasing: Does not smooth high-contrast texture patterns inside polygons or PBR specular highlight shimmering.
  • Does Not Resolve Alpha Cutoff (MASK / Cutoff) Edges: Boundaries created by alpha testing (such as foliage, fences, or Cutoff panels) are not actual polygon edges, so jagged edges remain.
  • Higher Memory Usage: Requires additional multi-sampled buffers (4x MSAA), increasing memory and bandwidth consumption.

2. Usage

Enabled via antialiasingManager.useMSAA. Enabling this automatically disables FXAA or TAA.

// Enable MSAA (Other AAs are disabled)
redGPUContext.antialiasingManager.useMSAA = true;

3. Quality Comparison

State	Result Image
Disabled (NONE)
MSAA Enabled

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Next Step: Learn FXAA