+" return light_colour.rgb * attenuation * falloff \n"
+" * step( g_day_phase, light_colour.w );\n"
+"}\n"
+"\n"
+"vec3 scene_calculate_packed_light_patch( uint packed_index, \n"
+" vec3 halfview, vec3 co, vec3 normal )\n"
+"{\n"
+" uint light_count = packed_index & 0x3u;\n"
+"\n"
+" vec3 l = vec3(0.0);\n"
+"\n"
+" if( light_count >= 1u ){\n"
+" int index_0 = int( ((packed_index >> 2u) & 0x3ffu) * 3u );\n"
+" int index_1 = int( ((packed_index >> 12u) & 0x3ffu) * 3u );\n"
+" int index_2 = int( ((packed_index >> 22u) & 0x3ffu) * 3u );\n"
+"\n"
+" l += scene_calculate_light( index_0, halfview, co, normal );\n"
+"\n"
+" if( light_count >= 2u ){\n"
+" l += scene_calculate_light( index_1, halfview, co, normal );\n"
+"\n"
+" if( light_count >= 3u ){\n"
+" l += scene_calculate_light( index_2, halfview, co, normal );\n"
+" }\n"
+" }\n"
+" }\n"
+"\n"
+" return l;\n"
+"}\n"
+"\n"
+"vec3 world_compute_lighting( vec3 diffuse, vec3 normal, vec3 co,\n"
+" float light_mask )\n"
+"{\n"
+" if( g_light_preview == 1 )\n"
+" diffuse = vec3(0.75);\n"
+"\n"
+" // Lighting\n"
+" vec3 halfview = uCamera - co;\n"
+" float fdist = length(halfview);\n"
+" halfview /= fdist;\n"
+"\n"
+" float world_shadow = newlight_compute_sun_shadow( \n"
+" co, g_sun_dir.xyz * (1.0/(max(g_sun_dir.y,0.0)+0.2)) );\n"
+"\n"
+" vec3 total_light = clearskies_lighting( \n"
+" normal, min( light_mask, world_shadow ), halfview );\n"
+"\n"
+" vec3 cube_coord = (co - g_cube_min.xyz) * g_cube_inv_range.xyz;\n"
+" cube_coord = floor( cube_coord );\n"
+"\n"
+" if( g_debug_indices == 1 )\n"