wet_hook gains shelter_taps/shelter_cell/shelter_amount (bilinear over
four cells; sheltered when a covered top is >= ~1 yd above the fragment,
the roof's own surface stays open). terrain, wow_model and static_gx
mirror the region after monkey and scale wet exposure by 1 - shelter
(wet_puddles takes exposure, so no puddles under cover); enhanced_water
suppresses rain rings under bridges/roofs via its row view. The lookup
runs only while wetness > 0 and the header is active, so a dry frame is
unchanged.
Verified: the wet_hook + receiver/water lookup snippets composed and
validated with naga_oil 0.20 / naga 27 (scratch harness; unpack2x16float
avoided - it needs a float16 capability). Full receiver shaders were not
compiled here (no GPU, no game data).
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01R8t89gSUuo1uvbXKdh1mJt
Claude
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