/vr/ - Retro Games

>>3378435
All or most of the muzzle flashes use the same bitmap texture, but with different palettes or gradient maps as opposed to simply tinting them a colour. This allowed them to create some varied colour textures and alter the shape somewhat by making the greys the white point and the whites and blacks the black point, as well as keep the texture count low--only a few high-res greyscale images and dozens of tiny palettes.

Not incredibly important for Doom since our use of gradients for translation is limited to two points, but you could do it with several translations in the Textures lump or use the idea to create new assets in your image editor of preference.