BooBoo caches textures

For example if you load the same image twice, the second time it uses the same texture. Same with sprites. So if you run image_update and updates some pixels of one of the images, they all change. There are several ways to get around it, if you want separate images you can _update individually. You can use image_read_texture then image_to_texture to create a new texture. Or image_create then draw the image to the render target.