Index: obj_common.h
===================================================================
--- obj_common.h	(revision 29423)
+++ obj_common.h	(revision 29424)
@@ -101,6 +101,7 @@
 	unsigned wireframe:1;        /* when 1, draw wireframe contours instead of solid objects */
 	unsigned thin_draw:1;        /* when 1, draw thin centerline instead of solid objects (implies thin_draw_poly) */
 	unsigned thin_draw_poly:1;   /* when 1, draw thin countour instead of solid polygons */
+	unsigned check_planes:1;     /* when 1, draw polygons only */
 	/* WARNING: After adding new fields, make sure to update pcb_xform_add() and pcb_xform_is_nop() below */
 };
 
@@ -118,6 +119,7 @@
 		__dst__->wireframe |= __src__->wireframe; \
 		__dst__->thin_draw |= __src__->thin_draw; \
 		__dst__->thin_draw_poly |= __src__->thin_draw_poly; \
+		__dst__->check_planes |= __src__->check_planes; \
 	} while(0)
 #define pcb_xform_is_nop(src) (\
 	((src)->bloat == 0) && \
@@ -126,7 +128,8 @@
 	((src)->no_slot_in_nonmech == 0) && \
 	((src)->wireframe == 0) && \
 	((src)->thin_draw == 0) && \
-	((src)->thin_draw_poly == 0) \
+	((src)->thin_draw_poly == 0) && \
+	((src)->check_planes == 0) \
 	)
 
 /* Returns true if overlay drawing should be omitted */