fix: use worldY (depth) in fog shader, remove CPU Y-flip#1244
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The fog of war shader was using worldZ (altitude) for the V coordinate, but ground units always have worldZ≈0, so they sampled the same texture row regardless of north-south position. This caused: - Wrong base revealed on startup - Moving south revealed north (inverted) Fixes: 1. EffectPasses.ts: Change visionV from worldZ to worldY (depth) 2. FogOfWar.ts: Remove Y-flip to match GPU path (VisionCompute) The GPU path (VisionCompute) writes directly to texture coords (cellX, cellY) without any flip, so the CPU path must match. https://claude.ai/code/session_013Hqn3PxBW8h7hpMNMKKv1e
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The fog of war shader was using worldZ (altitude) for the V coordinate, but ground units always have worldZ≈0, so they sampled the same texture row regardless of north-south position. This caused:
Fixes:
The GPU path (VisionCompute) writes directly to texture coords (cellX, cellY) without any flip, so the CPU path must match.
https://claude.ai/code/session_013Hqn3PxBW8h7hpMNMKKv1e