diff --git a/src/tile.cpp b/src/tile.cpp
index 6dbe4c6..103dba1 100644
--- a/src/tile.cpp
+++ b/src/tile.cpp
@@ -1345,6 +1345,7 @@ bool generate_image(std::string part_of_name, video::IImage *& baseimg,
                        infostream<<"combined w="<<w0<<" h="<<h0<<std::endl;
                        core::dimension2d<u32> dim(w0,h0);
                        baseimg = driver->createImage(video::ECF_A8R8G8B8, dim);
+                       baseimg->fill(video::SColor(0,0,0,0));
                        while(sf.atend() == false)
                        {
                                u32 x = stoi(sf.next(","));