Add normal mapping and parallax occlusion mapping for WMO surfaces

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Generate normal+height maps from diffuse textures at load time using
luminance-to-height and Sobel 3x3 filtering. Compute per-vertex tangents
via Lengyel's method for TBN basis construction.

Fragment shader uses screen-space UV derivatives (dFdx/dFdy) for smooth
LOD crossfade and angle-adaptive POM sample counts. Flat textures
naturally produce low height variance, causing POM to self-select off.

Settings: Normal Mapping on by default, POM off by default with
Low/Medium/High quality presets. Persisted across sessions.

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Kelsi 2026-02-23 01:10:58 -08:00

parent 1b16bcf71f

commit eaceb58e77

8 changed files with 424 additions and 33 deletions

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