diff --git a/vendor/clouds3d.js b/vendor/clouds3d.js
index b755466..63f4a57 100644
--- a/vendor/clouds3d.js
+++ b/vendor/clouds3d.js
@@ -447,7 +447,7 @@ function initGroundSystem(glCtx) {
     groundCtx.fillRect(0, 0, groundCanvas.width, groundCanvas.height);
     groundTexture = groundGl.createTexture();
     groundGl.bindTexture(groundGl.TEXTURE_2D, groundTexture);
-    groundGl.pixelStorei(groundGl.UNPACK_FLIP_Y_WEBGL, true);
+    groundGl.pixelStorei(groundGl.UNPACK_FLIP_Y_WEBGL, false);
     groundGl.texImage2D(groundGl.TEXTURE_2D, 0, groundGl.RGBA, groundGl.RGBA, groundGl.UNSIGNED_BYTE, groundCanvas);
     groundGl.texParameteri(groundGl.TEXTURE_2D, groundGl.TEXTURE_WRAP_S, groundGl.CLAMP_TO_EDGE);
     groundGl.texParameteri(groundGl.TEXTURE_2D, groundGl.TEXTURE_WRAP_T, groundGl.CLAMP_TO_EDGE);