1 files changed, 5 insertions, 2 deletions
diff --git a/shaders/tile-shader.vert b/shaders/tile-shader.vert
index 7a5bd1c3..cc90bae5 100644
--- a/shaders/tile-shader.vert
+++ b/shaders/tile-shader.vert
@@ -2,12 +2,15 @@ precision highp float;
 
 layout(location = 0) in vec4 position;
 layout(location = 1) in vec2 textureCoordinates;
-uniform mat4 projection;
+layout(location = 0) uniform mat4 projection;
+layout(location = 1) uniform float y_scale;
 
 out vec2 interpolatedTextureCoordinates;
+out float interpolated_frag_depth;
 
 void main() {
     interpolatedTextureCoordinates = textureCoordinates;
 
-    gl_Position = projection * position;
+    gl_Position = projection * vec4(position.xy, 0, position.w) + vec4(0, position.z * y_scale, 0, 0);
+    interpolated_frag_depth = position.z;
 }