--- a/engine.c	Mon Jun 27 17:45:21 2005 +0000
+++ b/engine.c	Mon Jun 27 21:34:31 2005 +0000
@@ -563,9 +563,8 @@
 		return 0;
 	}
 
-	direction %= 8;
-	if (rsg->sprites_per_set == 4)
-		direction %= 4;
+	assert(rsg->sprites_per_set <= 8);
+	direction %= rsg->sprites_per_set;
 
 	totalsets = in_motion ? rsg->loaded_count : rsg->loading_count;