diff --git a/vendor/clouds3d.js b/vendor/clouds3d.js
index 7f76261..7506955 100644
--- a/vendor/clouds3d.js
+++ b/vendor/clouds3d.js
@@ -318,8 +318,11 @@ function fetchTileImage(tileX, tileY) {
         img.crossOrigin = 'anonymous';
         img.onload = function() { resolve(img); };
         img.onerror = function() { reject(new Error('tile fetch failed')); };
-        // Carto/OSM-style format: {z}/{x}/{y}.png
-        img.src = GROUND_TILE_URL + GROUND_TILE_Z + '/' + tileX + '/' + tileY;
+        // Carto/OSM-style format: {z}/{x}/{y}.png with a per-tile cache
+        // buster to avoid any browser-cached 404s or CORS rejections
+        // from previous failed loads.
+        img.src = GROUND_TILE_URL + GROUND_TILE_Z + '/' + tileX + '/' + tileY
+            + '?v=' + Date.now() + '_' + Math.floor(Math.random() * 1e6);
     });
 }
 
@@ -397,8 +400,7 @@ function drawTileAt(lng, perp, dx, dz, centerTileX, centerTileY) {
         mirrorLabel('x=' + tileX, canvasX + GROUND_TILE_SIZE - 12, canvasY + GROUND_TILE_SIZE - 12, 'left');
 
         return true;
-    }).catch(function(err) {
-        console.warn('[clouds3d] tile fetch failed', tileX, tileY, err && err.message);
+    }).catch(function() {
         // On failure draw a neutral gray so the gap is at least
         // not the bright fog colour
         groundCtx.fillStyle = '#3a4458';
@@ -450,7 +452,6 @@ function rebuildGroundMosaic(centerTileX, centerTileY) {
 // smooth parallax within the loaded content.
 function refreshGroundMosaic() {
     if (!groundCtx) return;
-    console.log('[clouds3d] refreshGroundMosaic center', groundCenterTile);
     var fdx = (window.__flightDir && window.__flightDir.dx) || 0;
     var fdz = (window.__flightDir && window.__flightDir.dz) || 1;
     var camX = (fdx !== 0) ? groundCameraX * fdx : 0;