diff --git a/lib/torque/renderer/point.js b/lib/torque/renderer/point.js
index 0f53ae2..6e16f7e 100644
--- a/lib/torque/renderer/point.js
+++ b/lib/torque/renderer/point.js
@@ -104,13 +104,17 @@
     //
     _renderTile: function(tile, key, frame_offset, sprites, shader, shaderVars) {
       if(!this._canvas) return;
+
       var prof = Profiler.metric('PointRenderer:renderTile').start();
       var ctx = this._ctx;
-      //var res = 1;//this.options.resolution;
-      var activePixels = tile.timeCount[key];
+
       if(this.options.blendmode) {
         ctx.globalCompositeOperation = this.options.blendmode;
       }
+      if (this.options.cumulative && key > tile.maxDate) {
+        key = tile.maxDate - 1;
+      }
+      var activePixels = tile.timeCount[key];
       if(activePixels) {
         var pixelIndex = tile.timeIndex[key];
         for(var p = 0; p < activePixels; ++p) {
@@ -124,8 +128,8 @@
            //var x = tile.x[posIdx]*res - (sp.width >> 1);
            //var y = (256 - res - res*tile.y[posIdx]) - (sp.height >> 1);
            var x = tile.x[posIdx]- (sp.width >> 1);
-           var y = (256 - 1 - tile.y[posIdx]) - (sp.height >> 1);
-           ctx.drawImage(sp, x, y);
+           var y = 255 - tile.y[posIdx]; // flip mercator
+           ctx.drawImage(sp, x, y - (sp.height >> 1));
           }
         }
       }