+#if 1
+ SCAN_PLAYFIELD(x, y)
+#else
+ for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+#endif
+ {
+ int element = Feld[x][y];
+
+ if (element == EL_LIGHT_SWITCH &&
+ game.light_time_left > 0)
+ {
+ Feld[x][y] = EL_LIGHT_SWITCH_ACTIVE;
+ DrawLevelField(x, y);
+ }
+ else if (element == EL_LIGHT_SWITCH_ACTIVE &&
+ game.light_time_left == 0)
+ {
+ Feld[x][y] = EL_LIGHT_SWITCH;
+ DrawLevelField(x, y);
+ }
+ else if (element == EL_EMC_DRIPPER &&
+ game.light_time_left > 0)
+ {
+ Feld[x][y] = EL_EMC_DRIPPER_ACTIVE;
+ DrawLevelField(x, y);
+ }
+ else if (element == EL_EMC_DRIPPER_ACTIVE &&
+ game.light_time_left == 0)
+ {
+ Feld[x][y] = EL_EMC_DRIPPER;
+ DrawLevelField(x, y);
+ }
+ else if (element == EL_INVISIBLE_STEELWALL ||
+ element == EL_INVISIBLE_WALL ||
+ element == EL_INVISIBLE_SAND)
+ {
+ if (game.light_time_left > 0)
+ Feld[x][y] = getInvisibleActiveFromInvisibleElement(element);
+
+ DrawLevelField(x, y);
+
+ /* uncrumble neighbour fields, if needed */
+ if (element == EL_INVISIBLE_SAND)
+ DrawLevelFieldCrumbledSandNeighbours(x, y);
+ }
+ else if (element == EL_INVISIBLE_STEELWALL_ACTIVE ||
+ element == EL_INVISIBLE_WALL_ACTIVE ||
+ element == EL_INVISIBLE_SAND_ACTIVE)
+ {
+ if (game.light_time_left == 0)
+ Feld[x][y] = getInvisibleFromInvisibleActiveElement(element);
+
+ DrawLevelField(x, y);
+
+ /* re-crumble neighbour fields, if needed */
+ if (element == EL_INVISIBLE_SAND)
+ DrawLevelFieldCrumbledSandNeighbours(x, y);
+ }
+ }
+}
+
+static void RedrawAllInvisibleElementsForLenses()
+{
+ int x, y;
+
+#if 1
+ SCAN_PLAYFIELD(x, y)
+#else
+ for (y = 0; y < lev_fieldy; y++) for (x = 0; x < lev_fieldx; x++)
+#endif