Temporal Anti-Aliasing (TAA)

How to use more samples?

• Distributing / reuse samples across frames (time)
• Jittered sampling

如果场景是静止的，就好像是做了4个采样

随机的效果并不见得好，这里是用一个pattern，分布到四个角落。

State of the art image based anti-aliasing solution

• SMAA (Enhanced subpixel morphological AA)
• History: FXAA → MLAA (Morphological AA) → SMAA

Note: G-buffers should never be anti-aliased!

Temporal Super Resolution

• Super resolution (or super sampling)
  • Literal understanding: increasing resolution
  • Source 1 (DLSS 1.0): out of nowhere / completely guessed
  • Source 2 (DLSS 2.0): from temporal information
• Key idea of Deep Learning Super Sampling (DLSS) 2.0
  • Yet another TAA-like application
  • Temporally reuse samples to increase resolution

Deferred Shading

• Originally invented to save shading time