diff --git a/src/lightmap.cpp b/src/lightmap.cpp
index ac2eadff1dc89..e0b05b54e028e 100644
--- a/src/lightmap.cpp
+++ b/src/lightmap.cpp
@@ -241,11 +241,14 @@ void map::generate_lightmap( const int zlev )
                                                 ) && outside_cache[p.x + dir_x[i]][p.y + dir_y[i]]
                               ) {
                                 if( light_transparency( p ) > LIGHT_TRANSPARENCY_SOLID ) {
-                                    lm[p.x][p.y][quadrant::default_] = natural_light;
+                                    update_light_quadrants(
+                                        lm[p.x][p.y], natural_light, quadrant::default_ );
                                     apply_directional_light( p, dir_d[i], natural_light );
                                 } else {
-                                    lm[p.x][p.y][dir_quadrants[i][0]] = natural_light;
-                                    lm[p.x][p.y][dir_quadrants[i][1]] = natural_light;
+                                    update_light_quadrants(
+                                        lm[p.x][p.y], natural_light, dir_quadrants[i][0] );
+                                    update_light_quadrants(
+                                        lm[p.x][p.y], natural_light, dir_quadrants[i][1] );
                                 }
                             }
                         }
diff --git a/tests/vision_test.cpp b/tests/vision_test.cpp
index bbca0f0476239..06141819c441b 100644
--- a/tests/vision_test.cpp
+++ b/tests/vision_test.cpp
@@ -21,6 +21,7 @@ void full_map_test( const std::vector<std::string> &setup,
 
     g->place_player( tripoint( 60, 60, 0 ) );
     g->reset_light_level();
+    g->u.worn.clear(); // Remove any light-emitting clothing
     g->u.clear_effects();
     clear_map();
 
@@ -48,9 +49,16 @@ void full_map_test( const std::vector<std::string> &setup,
     tripoint origin;
     for( int y = 0; y < height; ++y ) {
         for( int x = 0; x < width; ++x ) {
-            if( setup[y][x] == 'U' || setup[y][x] == 'u' ) {
-                origin = g->u.pos() - point( x, y );
-                break;
+            switch( setup[y][x] ) {
+                case 'V':
+                case 'U':
+                case 'u':
+                    origin = g->u.pos() - point( x, y );
+                    if( setup[y][x] == 'V' ) {
+                        item headlamp( "wearable_light_on" );
+                        g->u.worn.push_back( headlamp );
+                    }
+                    break;
             }
         }
     }
@@ -63,7 +71,7 @@ void full_map_test( const std::vector<std::string> &setup,
         REQUIRE( player_offset.x >= 0 );
         REQUIRE( player_offset.x < width );
         char player_char = setup[player_offset.y][player_offset.x];
-        REQUIRE( ( player_char == 'U' || player_char == 'u' ) );
+        REQUIRE( ( player_char == 'U' || player_char == 'u' || player_char == 'V' ) );
     }
 
     for( int y = 0; y < height; ++y ) {
@@ -86,6 +94,7 @@ void full_map_test( const std::vector<std::string> &setup,
                     g->m.ter_set( p, t_floor );
                     break;
                 case 'U':
+                case 'V':
                     // Already handled above
                     break;
                 default:
@@ -269,6 +278,7 @@ static constexpr int midday = HOURS( 12 );
 // '-' - empty, indoors
 // 'U' - player, outdoors
 // 'u' - player, indoors
+// 'V' - player, with light in inventory
 // 'L' - light, indoors
 // '#' - wall
 // '=' - window frame
@@ -395,6 +405,30 @@ TEST_CASE( "vision_wall_obstructs_light", "[shadowcasting][vision]" )
     t.test_all();
 }
 
+TEST_CASE( "vision_wall_can_be_lit_by_player", "[shadowcasting][vision]" )
+{
+    vision_test_case t {
+        {
+            " V",
+            "  ",
+            "  ",
+            "##",
+            "--",
+        },
+        {
+            "44",
+            "44",
+            "44",
+            "44",
+            "66",
+        },
+        midnight,
+        true
+    };
+
+    t.test_all();
+}
+
 TEST_CASE( "vision_see_wall_in_moonlight", "[shadowcasting][vision]" )
 {
     const time_duration till_full_moon = calendar::season_length() / 3;