diff --git a/atlas-start.pcx b/atlas-start.pcx
new file mode 100755
index 0000000..c47becd
Binary files /dev/null and b/atlas-start.pcx differ
diff --git a/memory.h b/memory.h
index 820c6d1..04cc457 100644
--- a/memory.h
+++ b/memory.h
@@ -4,7 +4,7 @@
 #define SCRATCHLEN  1024
 extern u_char* const scratchpad;  // Starting address of scratchpad memory, i.e. the 1kB of data cache usable as fast RAM
 
-#define PRIMBUFLEN  65536  // TODO: reduce this to what's needed for a typical scene
+#define PRIMBUFLEN  65536*2  // TODO: reduce this to what's needed for a typical scene
 extern char *nextprim;
 extern char *primbuf_bounds;
 
diff --git a/test.ps1bsp b/test.ps1bsp
index edcc416..03a7bf0 100755
Binary files a/test.ps1bsp and b/test.ps1bsp differ
diff --git a/world.c b/world.c
index ed957c6..bdb58d4 100644
--- a/world.c
+++ b/world.c
@@ -288,6 +288,8 @@ static INLINE short world_planeDot(const SVECTOR *dir, const ps1bsp_plane_t *pla
 
 static void world_drawface(const world_t *world, const ps1bsp_face_t *face)
 {
+    // TODO: do an early primitive buffer check here, so we can skip backface culling & vertex copying if it's already full
+
     // Backface culling using the face's plane and center point
     // This eliminates the need for normal clipping per polygon
     SVECTOR cam_vec;