diff --git a/vendor/clouds3d.js b/vendor/clouds3d.js
index 7df2f70..2e3ec5a 100644
--- a/vendor/clouds3d.js
+++ b/vendor/clouds3d.js
@@ -337,7 +337,7 @@ function drawTileAt(lng, perp, dx, dz, centerTileX, centerTileY) {
     // UNPACK_FLIP_Y_WEBGL=true inverts V: canvas top -> texture V=1 (top).
     // For lng axis (Y): invert canvasY so lng=+12 (corridor front in
     // N flight) lands at small canvasY (= screen top after flip).
-    // For perp axis (X): keep the natural sign so world east (dx>0)
+    // === X-SWAP BUILD v3 === // X-swap: east (perp=-2) -> canvasX 1152 (right)
     // ends up at canvasX > halfPerp area (right side of canvas).
     var canvasX = (-perp + halfPerp + 0.5) * GROUND_TILE_SIZE;
     var canvasY = (lng + halfLong + 0.5) * GROUND_TILE_SIZE;
@@ -495,7 +495,8 @@ function initGroundSystem(glCtx) {
     if (groundCanvas) return; // already initialised
     groundGl = glCtx;
     groundCanvas = document.createElement('canvas');
-    groundCanvas.width = GROUND_TILE_SIZE * GROUND_CORRIDOR_PERP;
+    // Wider canvas so all X labels (at canvasX + 244) are visible
+    groundCanvas.width = GROUND_TILE_SIZE * GROUND_CORRIDOR_PERP + 2 * GROUND_TILE_SIZE;
     groundCanvas.height = GROUND_TILE_SIZE * GROUND_CORRIDOR_LONG;
     groundCtx = groundCanvas.getContext('2d');
     // Pre-fill with fog colour so partially-loaded mosaic still