diff --git a/overviewer_core/src/primitives/smooth-lighting.c b/overviewer_core/src/primitives/smooth-lighting.c
index fb28be6..86196be 100644
--- a/overviewer_core/src/primitives/smooth-lighting.c
+++ b/overviewer_core/src/primitives/smooth-lighting.c
@@ -219,7 +219,9 @@ smooth_lighting_draw(void *data, RenderState *state, PyObject *src, PyObject *ma
     
     /* special case for leaves, water 8, water 9, ice 79
        -- these are also smooth-lit! */
-    if (state->block != block_leaves && state->block != block_flowing_water && state->block != block_water && state->block != block_ice && is_transparent(state->block))
+    if (!block_class_is_subset(state->block,(mc_block_t[]){
+            block_leaves,block_flowing_water,block_water,block_ice
+        },4) && is_transparent(state->block))
     {
         /* transparent blocks are rendered as usual, with flat lighting */
         primitive_lighting.draw(data, state, src, mask, mask_light);