Photo (later): motion blur, volumetric sun shafts, temporal AA #118

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opened 2026-09-27 17:16:18 +00:00 by sky_line · 3 comments
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Black-Dragon-only render features; upstream Alchemy has none of them. A separate, later track.

  • Velocity pass: camera-only velocity is nearly free from prev_view/prev_proj; object/rigged velocity needs per-instance previous transforms.
  • Motion blur along screen-space velocity.
  • Volumetric sun shafts.
  • Temporal AA (BD uses SMAA T2x).

Reference GLSL: BD class1/deferred/{velocityV,velocityF,motionBlurF}.glsl, class3/deferred/volumetricLightF.glsl.

Size: L

Black-Dragon-only render features; upstream Alchemy has none of them. A separate, later track. - Velocity pass: camera-only velocity is nearly free from `prev_view`/`prev_proj`; object/rigged velocity needs per-instance previous transforms. - Motion blur along screen-space velocity. - Volumetric sun shafts. - Temporal AA (BD uses SMAA T2x). Reference GLSL: BD `class1/deferred/{velocityV,velocityF,motionBlurF}.glsl`, `class3/deferred/volumetricLightF.glsl`. Size: L
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Owner

Part of epic #119.

Part of epic #119.
sky_line added this to the Slipstream project 2026-10-06 15:04:15 +00:00
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Owner

Motion blur first cut: b7e471006a / ffd79c6e1c. Owner feedback: camera motion blurs the whole screen and it is grainy -- being rebuilt as a standard tile-max / neighbor-max reconstruction with depth-aware weights, before the temporal resolve, with separate camera-rotation / camera-translation / object scales. Temporal AA and sun shafts already exist on the Vulkan path.

Motion blur first cut: b7e471006a / ffd79c6e1c. Owner feedback: camera motion blurs the whole screen and it is grainy -- being rebuilt as a standard tile-max / neighbor-max reconstruction with depth-aware weights, before the temporal resolve, with separate camera-rotation / camera-translation / object scales. Temporal AA and sun shafts already exist on the Vulkan path.
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Owner

Done. Motion blur was rebuilt as a tile-based reconstruction filter (8f33eb8ee1, 252cc5f374) with Off / Realistic / Cinematic presets (4a1cbbd7b7); owner verified the look and cost in-world (2026-10-09/10). Temporal AA and sun shafts already exist on the Vulkan path (see the earlier comment). Shipped in 1.2.0 (tag v1.2.0, 55f4242518).

Done. Motion blur was rebuilt as a tile-based reconstruction filter (8f33eb8ee1, 252cc5f374) with Off / Realistic / Cinematic presets (4a1cbbd7b7); owner verified the look and cost in-world (2026-10-09/10). Temporal AA and sun shafts already exist on the Vulkan path (see the earlier comment). Shipped in 1.2.0 (tag v1.2.0, 55f4242518).
sky_line 2026-10-10 05:32:58 +00:00
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sky_line/Slipstream#118
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