diff --git a/src/graphics/render/BlocksRenderer.cpp b/src/graphics/render/BlocksRenderer.cpp
index d153cb040..8466008da 100644
--- a/src/graphics/render/BlocksRenderer.cpp
+++ b/src/graphics/render/BlocksRenderer.cpp
@@ -326,7 +326,9 @@ void BlocksRenderer::blockCustomModel(
                       0.5f;
             vp = vp.x * X + vp.y * Y + vp.z * Z;
 
-            if (!isOpen(glm::floor(coord + vp + 0.5f + n * 1e-3f), block, variant) && is_aligned(n)) {
+            if (!block.rt.extended
+                && !isOpen(glm::floor(coord + vp + 0.5f + n * 1e-3f), block, variant)
+                && is_aligned(n)) {
                 continue;
             }