# TAA

Temporal anti-aliasing stabilises a high-frequency scene under an orbiting camera.

```{raw} html
<a class="example-run-button" href="../demos/features_3d_taa.html">▶ Run in browser</a>

```

**Tags:** `3d`

Temporal anti-aliasing jitters the camera sub-pixel each frame and accumulates
the result into a history buffer, reprojecting it through PER-PIXEL motion so the
accumulation tracks both camera AND moving-object motion. The scene below packs
thin edges and a checker floor (high-frequency detail that aliases badly) and
orbits the camera so the difference between TAA on/off is visible: edges crawl
and shimmer with TAA off, and resolve to stable smooth lines with TAA on.

A fast-moving emissive cube sweeps across the frame: with only camera-motion
reprojection it would smear a ghost trail behind itself, but the per-object
velocity buffer reprojects its history through its own motion, so the trailing
edge stays clean (no smear).

TAA is OFF by default engine-wide (it costs a history buffer + resolve pass); this
demo opts in via ``WorldEnvironment.taa_enabled = True``.

Controls:
    T   : Toggle TAA on/off
    A/D : Slow down / speed up the orbit
    ESC : Quit

Usage:
    uv run python examples/features/3d/taa.py
    uv run python examples/features/3d/taa.py --test

## Source

```{literalinclude} ../../examples/features/3d/taa.py
:language: python
:linenos:
```