diff --git a/src/ol/renderer/canvas/canvasimagelayerrenderer.js b/src/ol/renderer/canvas/canvasimagelayerrenderer.js
index c752dd4630..22fae30287 100644
--- a/src/ol/renderer/canvas/canvasimagelayerrenderer.js
+++ b/src/ol/renderer/canvas/canvasimagelayerrenderer.js
@@ -170,11 +170,13 @@ ol.renderer.canvas.ImageLayer.prototype.prepareFrame =
   if (!hints[ol.ViewHint.ANIMATING] && !hints[ol.ViewHint.INTERACTING] &&
       !ol.extent.isEmpty(renderedExtent)) {
     var projection = viewState.projection;
-    var sourceProjection = imageSource.getProjection();
-    if (sourceProjection) {
-      goog.asserts.assert(ol.proj.equivalent(projection, sourceProjection),
-          'projection and sourceProjection are equivalent');
-      projection = sourceProjection;
+    if (!ol.ENABLE_RASTER_REPROJECTION) {
+      var sourceProjection = imageSource.getProjection();
+      if (sourceProjection) {
+        goog.asserts.assert(ol.proj.equivalent(projection, sourceProjection),
+            'projection and sourceProjection are equivalent');
+        projection = sourceProjection;
+      }
     }
     image = imageSource.getImage(
         renderedExtent, viewResolution, pixelRatio, projection);
diff --git a/src/ol/renderer/dom/domimagelayerrenderer.js b/src/ol/renderer/dom/domimagelayerrenderer.js
index 29308d3ee2..033de8614b 100644
--- a/src/ol/renderer/dom/domimagelayerrenderer.js
+++ b/src/ol/renderer/dom/domimagelayerrenderer.js
@@ -101,11 +101,13 @@ ol.renderer.dom.ImageLayer.prototype.prepareFrame =
   if (!hints[ol.ViewHint.ANIMATING] && !hints[ol.ViewHint.INTERACTING] &&
       !ol.extent.isEmpty(renderedExtent)) {
     var projection = viewState.projection;
-    var sourceProjection = imageSource.getProjection();
-    if (sourceProjection) {
-      goog.asserts.assert(ol.proj.equivalent(projection, sourceProjection),
-          'projection and sourceProjection are equivalent');
-      projection = sourceProjection;
+    if (!ol.ENABLE_RASTER_REPROJECTION) {
+      var sourceProjection = imageSource.getProjection();
+      if (sourceProjection) {
+        goog.asserts.assert(ol.proj.equivalent(projection, sourceProjection),
+            'projection and sourceProjection are equivalent');
+        projection = sourceProjection;
+      }
     }
     var image_ = imageSource.getImage(renderedExtent, viewResolution,
         frameState.pixelRatio, projection);
diff --git a/src/ol/renderer/layerrenderer.js b/src/ol/renderer/layerrenderer.js
index e3d368b2e8..cd0dba0093 100644
--- a/src/ol/renderer/layerrenderer.js
+++ b/src/ol/renderer/layerrenderer.js
@@ -159,8 +159,9 @@ ol.renderer.Layer.prototype.loadImage = function(image) {
   if (imageState == ol.ImageState.IDLE) {
     image.load();
     imageState = image.getState();
-    goog.asserts.assert(imageState == ol.ImageState.LOADING,
-        'imageState is "loading"');
+    goog.asserts.assert(imageState == ol.ImageState.LOADING ||
+        imageState == ol.ImageState.LOADED,
+        'imageState is "loading" or "loaded"');
   }
   return imageState == ol.ImageState.LOADED;
 };
diff --git a/src/ol/renderer/webgl/webglimagelayerrenderer.js b/src/ol/renderer/webgl/webglimagelayerrenderer.js
index 317544fc66..8aad156335 100644
--- a/src/ol/renderer/webgl/webglimagelayerrenderer.js
+++ b/src/ol/renderer/webgl/webglimagelayerrenderer.js
@@ -125,11 +125,13 @@ ol.renderer.webgl.ImageLayer.prototype.prepareFrame =
   if (!hints[ol.ViewHint.ANIMATING] && !hints[ol.ViewHint.INTERACTING] &&
       !ol.extent.isEmpty(renderedExtent)) {
     var projection = viewState.projection;
-    var sourceProjection = imageSource.getProjection();
-    if (sourceProjection) {
-      goog.asserts.assert(ol.proj.equivalent(projection, sourceProjection),
-          'projection and sourceProjection are equivalent');
-      projection = sourceProjection;
+    if (!ol.ENABLE_RASTER_REPROJECTION) {
+      var sourceProjection = imageSource.getProjection();
+      if (sourceProjection) {
+        goog.asserts.assert(ol.proj.equivalent(projection, sourceProjection),
+            'projection and sourceProjection are equivalent');
+        projection = sourceProjection;
+      }
     }
     var image_ = imageSource.getImage(renderedExtent, viewResolution,
         pixelRatio, projection);