diff --git a/src/r_defs.h b/src/r_defs.h
index c43b6be83..5f8272b3d 100644
--- a/src/r_defs.h
+++ b/src/r_defs.h
@@ -38,8 +38,8 @@
 
 #include "dthinker.h"
 
-#define MAXWIDTH 2880
-#define MAXHEIGHT 1800
+#define MAXWIDTH 5760
+#define MAXHEIGHT 3600
 
 const WORD NO_INDEX = 0xffffu;
 const DWORD NO_SIDE = 0xffffffffu;