Fix mapgen block_is_underground heuristic

diff --git a/src/mapgen.cpp b/src/mapgen.cpp
index fd5851c9816df7e00a952d1fcb8e9467463c76c9..0dfd6731212cac0f98adc0adcb86ce9db30e4e94 100644 (file)
--- a/src/mapgen.cpp
+++ b/src/mapgen.cpp
@@ -1328,9 +1328,7 @@ void make_block(BlockMakeData *data)
        //double gen_area_nodes = MAP_BLOCKSIZE*MAP_BLOCKSIZE * rel_volume;
 
        // Horribly wrong heuristic, but better than nothing
-       bool block_is_underground = (WATER_LEVEL /* local minimum ground level */ > 
-                       MAP_BLOCKSIZE * (data->blockpos_max.X
-                                       - data->blockpos_min.X + 1) / 2);
+       bool block_is_underground = (WATER_LEVEL > node_max.Y);
 
        /*
                Create a block-specific seed