diff --git a/shader/main3d.vert.glsl b/shader/main3d.vert.glsl
index ddf8353..b14fa13 100644
--- a/shader/main3d.vert.glsl
+++ b/shader/main3d.vert.glsl
@@ -31,6 +31,8 @@ void main()
   inputUV = geoModeSelect(G_TEX_GEN, inUV, normScreen.xy * 0.5 + 0.5);
 
   inputUV *= material.texSize;
+  // invert  Y
+  inputUV.y = material.texSize.y - inputUV.y;
 
   // @TODO: uvgen (f3d + t3d)
   // forward CC (@TODO: do part of this here? e.g. prim/env/shade etc.)
diff --git a/shader/textures.glsl b/shader/textures.glsl
index 823cf8b..04dc464 100644
--- a/shader/textures.glsl
+++ b/shader/textures.glsl
@@ -34,6 +34,9 @@ vec4 wrappedMirrorSample(const sampler2D tex, vec2 uv, const vec2 mask, const ve
   // clamp again (mask S/T), this is also done to avoid OOB texture access
   uv = mod(uv, min(texSize, mask));
 
+  // invert Y again
+  uv.y = texSize.y - uv.y - 1;
+
   return texelFetch(tex, ivec2(floor(uv)), 0);
 }
 
@@ -48,7 +51,8 @@ vec4 sampleSampler(in const sampler2D tex, in const TileConf tileConf, in vec2 u
   uvCoord = round(uvCoord * LOW_PRECISION) / LOW_PRECISION;
 #endif
 
-  uvCoord -= tileConf.low;
+  // invert Y again, but only for applying tile low
+  uvCoord -= tileConf.low * vec2(1.0, -1.0);
 
   const vec2 isClamp      = step(tileConf.mask, vec2(1.0)); // if mask is negated, clamp
   const vec2 isMirror     = step(tileConf.high, vec2(0.0)); // if high is negated, mirror