4 files changed, 11 insertions, 6 deletions
diff --git a/src/mbgl/renderer/layers/render_raster_layer.cpp b/src/mbgl/renderer/layers/render_raster_layer.cpp
index 06616d90e5..b41b2ac560 100644
--- a/src/mbgl/renderer/layers/render_raster_layer.cpp
+++ b/src/mbgl/renderer/layers/render_raster_layer.cpp
@@ -137,13 +137,13 @@ void RenderRasterLayer::render(PaintParameters& parameters, RenderSource* source
 
             if (bucket.vertexBuffer && bucket.indexBuffer && !bucket.segments.empty()) {
                 // Draw only the parts of the tile that aren't drawn by another tile in the layer.
-                draw(tile.matrix,
+                draw(parameters.matrixForTile(tile.id, true),
                      *bucket.vertexBuffer,
                      *bucket.indexBuffer,
                      bucket.segments);
             } else {
                 // Draw the full tile.
-                draw(tile.matrix,
+                draw(parameters.matrixForTile(tile.id, true),
                      parameters.staticData.rasterVertexBuffer,
                      parameters.staticData.quadTriangleIndexBuffer,
                      parameters.staticData.rasterSegments);
diff --git a/src/mbgl/renderer/paint_parameters.cpp b/src/mbgl/renderer/paint_parameters.cpp
index 58dd5597a5..a7f621eb61 100644
--- a/src/mbgl/renderer/paint_parameters.cpp
+++ b/src/mbgl/renderer/paint_parameters.cpp
@@ -35,6 +35,10 @@ PaintParameters::PaintParameters(gl::Context& context_,
     // Update the default matrices to the current viewport dimensions.
     state.getProjMatrix(projMatrix);
 
+    // Also compute a projection matrix that aligns with the current pixel grid, taking into account
+    // odd viewport sizes.
+    state.getProjMatrix(alignedProjMatrix, 1, true);
+
     // Calculate a second projection matrix with the near plane clipped to 100 so as
     // not to waste lots of depth buffer precision on very close empty space, for layer
     // types (fill-extrusion) that use the depth buffer to emulate real-world space.
@@ -47,10 +51,10 @@ PaintParameters::PaintParameters(gl::Context& context_,
     }
 }
 
-mat4 PaintParameters::matrixForTile(const UnwrappedTileID& tileID) {
+mat4 PaintParameters::matrixForTile(const UnwrappedTileID& tileID, bool aligned) const {
     mat4 matrix;
     state.matrixFor(matrix, tileID);
-    matrix::multiply(matrix, projMatrix, matrix);
+    matrix::multiply(matrix, aligned ? alignedProjMatrix : projMatrix, matrix);
     return matrix;
 }
 
diff --git a/src/mbgl/renderer/paint_parameters.hpp b/src/mbgl/renderer/paint_parameters.hpp
index 5c934c2239..41f46ae34e 100644
--- a/src/mbgl/renderer/paint_parameters.hpp
+++ b/src/mbgl/renderer/paint_parameters.hpp
@@ -62,9 +62,10 @@ public:
     gl::StencilMode stencilModeForClipping(const ClipID&) const;
     gl::ColorMode colorModeForRenderPass() const;
 
-    mat4 matrixForTile(const UnwrappedTileID&);
+    mat4 matrixForTile(const UnwrappedTileID&, bool aligned = false) const;
 
     mat4 projMatrix;
+    mat4 alignedProjMatrix;
     mat4 nearClippedProjMatrix;
 
     int numSublayers = 3;
diff --git a/src/mbgl/renderer/sources/render_image_source.cpp b/src/mbgl/renderer/sources/render_image_source.cpp
index 35b80cd998..31a5916a34 100644
--- a/src/mbgl/renderer/sources/render_image_source.cpp
+++ b/src/mbgl/renderer/sources/render_image_source.cpp
@@ -41,7 +41,7 @@ void RenderImageSource::startRender(PaintParameters& parameters) {
         mat4 matrix;
         matrix::identity(matrix);
         parameters.state.matrixFor(matrix, tileIds[i]);
-        matrix::multiply(matrix, parameters.projMatrix, matrix);
+        matrix::multiply(matrix, parameters.alignedProjMatrix, matrix);
         matrices.push_back(matrix);
     }