GameMaker Lights Cutting into eachother

[William Garrison]

I just followed a tutorial on lights and finally got one that works with my system and current GMS. Great BYT for some reason my lights are cutting into each other. The gentleman in the video doesn't seem to have that issue as far as I can tell. I have double checked the code and cant find anything wrong. Im hoping someone here can show me how to fix.



Here is the tutorial I followed to get here.

Below is my code...
CREATE

lighting_surface = -1;

DRAW

// if no surface exists, draw one
if (surface_exists(lighting_surface) == false) {
    lighting_surface = surface_create(room_width, room_height);   
}

surface_set_target(lighting_surface);    // set the surface
draw_clear_alpha(c_black, 0.33);        // darken the room

// create and blend the light
with(oLight) {
    
    var wob_am_x    = image_xscale + random_range(-wobble, wobble);
    var wob_am_y    = image_yscale + random_range(-wobble, wobble);
    
    // draw and cutout the sprite
    gpu_set_blendmode(bm_subtract);
    draw_sprite_ext(sprite_index, image_index, thisXY.x, thisXY.y, wob_am_x, wob_am_y, 0, c_white, 1);
    
    // color and intensity alterations in the room editor
    gpu_set_blendmode(bm_add);
    draw_sprite_ext(sprite_index, image_index, thisXY.x, thisXY.y, wob_am_x, wob_am_y, 0, color, intensity);
    
    gpu_set_blendmode(bm_normal); // reset blendmode
    
}

surface_reset_target(); // reset the surface

draw_surface(lighting_surface, 0 , 0); // draw the surface to screen

Inside of the light itself I only have 4 variables set up...
Color, intensity, wobble and thisXY

 

[GMWolf]

It looks like blending isn't being applied. Make sure you have blend mode enabled with the blendenable.
Also make sure.your light objects are not visible.

I understand from other posts you may be using views into a large room.
Creating a surface the size of you room will use a crazy large amount of Vram... You may run into issues there in the future.