diff --git a/src/picom.c b/src/picom.c
index 9bfcc8c6..af27b40f 100644
--- a/src/picom.c
+++ b/src/picom.c
@@ -471,6 +471,7 @@ static struct managed_win *paint_preprocess(session_t *ps, bool *fade_running) {
 
 		// Update window mode
 		w->mode = win_calc_mode(w);
+		log_trace("Window %#010x (%s) has mode %d", w->base.id, w->name, w->mode);
 
 		// Destroy all reg_ignore above when frame opaque state changes on
 		// SOLID mode
diff --git a/src/render.c b/src/render.c
index c0e33e33..880c2c4b 100644
--- a/src/render.c
+++ b/src/render.c
@@ -852,6 +852,12 @@ void paint_all(session_t *ps, struct managed_win *t, bool ignore_damage) {
 	// Whether this is beneficial is to be determined XXX
 	for (auto w = t; w; w = w->prev_trans) {
 		region_t bshape = win_get_bounding_shape_global_by_val(w);
+		log_trace("Window %#010x (%s) has mode %d", w->base.id, w->name, w->mode);
+		if (w->reg_ignore) {
+			dump_region(w->reg_ignore);
+		} else {
+			log_trace("reg_ignore null");
+		}
 		// Painting shadow
 		if (w->shadow) {
 			// Lazy shadow building