diff --git a/src/game/boe.newgraph.cpp b/src/game/boe.newgraph.cpp
index a8afd53c..d988020c 100644
--- a/src/game/boe.newgraph.cpp
+++ b/src/game/boe.newgraph.cpp
@@ -153,7 +153,10 @@ void apply_unseen_mask() {
 void apply_light_mask(bool onWindow) {
 	static Region dark_mask_region;
 	rectangle temp = {0,0,108,84},paint_rect,base_rect = {0,0,36,28};
-	rectangle big_to = {13,13,337,265};
+	// I correct the values to make the display ok
+	// but I am not sure what are the correct values
+	rectangle big_to = {13+2,13+14,337+3,265+15};
+	//rectangle big_to = {13,13,337,265};
 	bool same_mask = true;
 	if(!get_bool_pref("DrawTerrainFrills", true) || fog_lifted)
 		return;
@@ -211,7 +214,9 @@ void apply_light_mask(bool onWindow) {
 	for(short i = 1; i < 12; i++)
 		for(short j = 1; j < 12; j++) {
 			if(light_area[i][j] == 2) {
-				int xOffset = 13 + 28 * (i - 3), yOffset = 13 + 36 * (j - 3);
+				// UNSURE WHY 28+...,18+... seems to gives better result that 13+...,13+...
+				int xOffset = 28 + 28 * (i - 3), yOffset = 18 + 36 * (j - 3);
+				//int xOffset = 13 + 28 * (i - 3), yOffset = 13 + 36 * (j - 3);
 				Region oval_region;
 				oval_region.addEllipse(temp);
 				oval_region.offset(xOffset, yOffset);