From cf3c1141724be718ecf340ac2b3a7495ac822791 Mon Sep 17 00:00:00 2001
From: AI Bot <bot@digifox.live>
Date: Wed, 30 Sep 2026 18:26:43 +0530
Subject: [PATCH] fix: correct UV mapping horizontal flip issue on cylindrical
 and spherical projections

---
 src/lib/bakingUtils.ts | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/lib/bakingUtils.ts b/src/lib/bakingUtils.ts
index e1661b5..2233e07 100644
--- a/src/lib/bakingUtils.ts
+++ b/src/lib/bakingUtils.ts
@@ -40,7 +40,7 @@ export function reprojectUVs(geometry: THREE.BufferGeometry, mappingType: 'plana
       const centeredZ = z - center.z;
       // atan2 returns -PI to PI. We want 0 to 1 around the cylinder.
       let angle = Math.atan2(centeredZ, centeredX);
-      u = (angle + Math.PI) / (2 * Math.PI);
+      u = 1.0 - ((angle + Math.PI) / (2 * Math.PI));
       v = 1.0 - ny;
     } else if (mappingType === 'sphere') {
       // Spherical projection
@@ -52,7 +52,7 @@ export function reprojectUVs(geometry: THREE.BufferGeometry, mappingType: 'plana
       const phi = Math.acos(centeredY / radius); // 0 to PI
       let theta = Math.atan2(centeredZ, centeredX); // -PI to PI
       
-      u = (theta + Math.PI) / (2 * Math.PI);
+      u = 1.0 - ((theta + Math.PI) / (2 * Math.PI));
       v = phi / Math.PI; // 0 at top, 1 at bottom
     } else if (mappingType === 'box') {
       // Simple box projection (pick dominant axis based on normal)