diff --git a/shaders/gles2/common.inc.glsl b/shaders/gles2/common.inc.glsl
index 8283ce2b..a54bfd11 100644
--- a/shaders/gles2/common.inc.glsl
+++ b/shaders/gles2/common.inc.glsl
@@ -150,7 +150,6 @@ vec2 computeMCAASnappedPosition(vec2 position,
     position = transformVertexPositionST(position, localTransformST);
     position = transformVertexPositionST(position, globalTransformST);
     position = convertClipToScreenSpace(position, framebufferSize);
-    //position.x = abs(mod(position.x, 1.0)) < 0.5 ? floor(position.x) : ceil(position.x);
 
     float xNudge = fract(position.x);
     if (xNudge < 0.5)
diff --git a/shaders/gles2/mcaa-multi.vs.glsl b/shaders/gles2/mcaa-multi.vs.glsl
index b96d8af4..8e41a259 100644
--- a/shaders/gles2/mcaa-multi.vs.glsl
+++ b/shaders/gles2/mcaa-multi.vs.glsl
@@ -85,8 +85,11 @@ void main() {
 
     float depth = convertPathIndexToViewportDepthValue(pathID);
 
+    // Use the same side--in this case, the top--or else floating point error during partitioning
+    // can occasionally cause inconsistent rounding, resulting in cracks.
     vec2 position;
-    position.x = mix(tlPosition.x, brPosition.x, quadPosition.x);
+    position.x = quadPosition.x < 0.5 ? tlPosition.x : trPosition.x;
+
     if (quadPosition.y < 0.5)
         position.y = floor(min(tlPosition.y, trPosition.y));
     else