diff --git a/Blender/pico3d_blender_exporter.py b/Blender/pico3d_blender_exporter.py
index e8dacc3..5f8596c 100644
--- a/Blender/pico3d_blender_exporter.py
+++ b/Blender/pico3d_blender_exporter.py
@@ -569,7 +569,7 @@ def generate_lights(self, context):
         fixed_point_factor = context.scene.fixed_point_factor
         
         lights = ''
-        chunk_lights = 'struct chunk_lighting chunk_lights[' + str(world_size_x) + '][' + str(world_size_y) + '] = {'
+        chunk_lights = 'const struct chunk_lighting chunk_lights[' + str(world_size_x) + '][' + str(world_size_y) + '] = {'
         
         chunk_light_data = ''
         
@@ -608,7 +608,7 @@ def generate_lights(self, context):
                         
                 #write out light information for that chunk
                 if (light_count > 0):
-                    chunk_light_data += 'struct light lights_' + str(x) + '_' + str(y) + '[' + str(light_count) + '] = {' + light_data + '};\n'
+                    chunk_light_data += 'const struct light lights_' + str(x) + '_' + str(y) + '[' + str(light_count) + '] = {' + light_data + '};\n'
                     chunk_lights += '{' + str(light_count) + ', ' + 'lights_' + str(x) + '_' + str(y) + '}'
                 else:
                     chunk_lights += '{0, NULL}'
diff --git a/chunk_data.h b/chunk_data.h
index 2fb2ded..fa97e4c 100644
--- a/chunk_data.h
+++ b/chunk_data.h
@@ -6182,29 +6182,29 @@ struct texture chunk_texture_list[11] = {{32, 0, 0, texture0},
 {32, 0, 0, texture8},
 {32, 0, 0, texture9},
 {32, 0, 0, texture10}};
-struct light lights_0_4[1] = {{-52610,3487,-16584}};
-struct light lights_1_1[1] = {{-46605,8919,-43803}};
-struct light lights_1_2[1] = {{-49841,6168,-30955}};
-struct light lights_1_3[1] = {{-44624,12437,-23313}};
-struct light lights_1_5[1] = {{-42158,4804,-1527}};
-struct light lights_1_6[1] = {{-49209,4804,5727}};
-struct light lights_1_7[1] = {{-41948,4804,11493}};
-struct light lights_2_1[1] = {{-36197,3567,-50205}};
-struct light lights_2_6[1] = {{-35515,6256,4518}};
-struct light lights_2_7[1] = {{-32061,4838,18537}};
-struct light lights_2_8[1] = {{-38616,4838,28471}};
-struct light lights_2_9[1] = {{-33019,4838,38831}};
-struct light lights_2_10[1] = {{-38953,4838,50340}};
-struct light lights_3_1[1] = {{-25117,8328,-43793}};
-struct light lights_3_2[1] = {{-26009,15195,-38549}};
-struct light lights_3_3[1] = {{-22167,8031,-21032}};
-struct light lights_3_4[2] = {{-28239,16250,-16556},
+const struct light lights_0_4[1] = {{-52610,3487,-16584}};
+const struct light lights_1_1[1] = {{-46605,8919,-43803}};
+const struct light lights_1_2[1] = {{-49841,6168,-30955}};
+const struct light lights_1_3[1] = {{-44624,12437,-23313}};
+const struct light lights_1_5[1] = {{-42158,4804,-1527}};
+const struct light lights_1_6[1] = {{-49209,4804,5727}};
+const struct light lights_1_7[1] = {{-41948,4804,11493}};
+const struct light lights_2_1[1] = {{-36197,3567,-50205}};
+const struct light lights_2_6[1] = {{-35515,6256,4518}};
+const struct light lights_2_7[1] = {{-32061,4838,18537}};
+const struct light lights_2_8[1] = {{-38616,4838,28471}};
+const struct light lights_2_9[1] = {{-33019,4838,38831}};
+const struct light lights_2_10[1] = {{-38953,4838,50340}};
+const struct light lights_3_1[1] = {{-25117,8328,-43793}};
+const struct light lights_3_2[1] = {{-26009,15195,-38549}};
+const struct light lights_3_3[1] = {{-22167,8031,-21032}};
+const struct light lights_3_4[2] = {{-28239,16250,-16556},
 {-29301,4952,-10770}};
-struct light lights_3_5[1] = {{-29301,4952,-941}};
-struct light lights_3_7[1] = {{-29721,4838,11386}};
-struct light lights_4_6[1] = {{-11391,4952,1068}};
-struct light lights_10_2[1] = {{46080,5785,-35840}};
-struct chunk_lighting chunk_lights[12][12] = {{{0, NULL},{0, NULL},{0, NULL},{0, NULL},{1, lights_0_4},{0, NULL},{0, NULL},{0, NULL},{0, NULL},{0, NULL},{0, NULL},{0, NULL}},
+const struct light lights_3_5[1] = {{-29301,4952,-941}};
+const struct light lights_3_7[1] = {{-29721,4838,11386}};
+const struct light lights_4_6[1] = {{-11391,4952,1068}};
+const struct light lights_10_2[1] = {{46080,5785,-35840}};
+const struct chunk_lighting chunk_lights[12][12] = {{{0, NULL},{0, NULL},{0, NULL},{0, NULL},{1, lights_0_4},{0, NULL},{0, NULL},{0, NULL},{0, NULL},{0, NULL},{0, NULL},{0, NULL}},
 {{0, NULL},{1, lights_1_1},{1, lights_1_2},{1, lights_1_3},{0, NULL},{1, lights_1_5},{1, lights_1_6},{1, lights_1_7},{0, NULL},{0, NULL},{0, NULL},{0, NULL}},
 {{0, NULL},{1, lights_2_1},{0, NULL},{0, NULL},{0, NULL},{0, NULL},{1, lights_2_6},{1, lights_2_7},{1, lights_2_8},{1, lights_2_9},{1, lights_2_10},{0, NULL}},
 {{0, NULL},{1, lights_3_1},{1, lights_3_2},{1, lights_3_3},{2, lights_3_4},{1, lights_3_5},{0, NULL},{1, lights_3_7},{0, NULL},{0, NULL},{0, NULL},{0, NULL}},
diff --git a/engine/render_globals.h b/engine/render_globals.h
index 5dab637..eb7ce72 100644
--- a/engine/render_globals.h
+++ b/engine/render_globals.h
@@ -129,7 +129,7 @@ struct light {
 //lights in a chunk
 struct chunk_lighting {
     int32_t number;
-    struct light *lights;
+    const struct light *lights;
 };
 
 
diff --git a/engine/render_lighting.cpp b/engine/render_lighting.cpp
index 0d8d20d..4a1fe0e 100644
--- a/engine/render_lighting.cpp
+++ b/engine/render_lighting.cpp
@@ -2,7 +2,7 @@
 //every vertex is compared to the chunk it is in and the neighbouring chunks in a 3x3 fashion
 
 
-int32_t process_lighting(struct light &light, vertex_32 &vertex, color_t &color) {
+int32_t process_lighting(const struct light &light, vertex_32 &vertex, color_t &color) {
     
     if (((light.position.x - vertex.x) * (light.position.x - vertex.x)) + 
         ((light.position.y - vertex.y) * (light.position.y - vertex.y)) +