I was looking to flash the screen when a player takes a hit and I would like to flash only without using a Texture.
PRIMARY REASON :
If I use the texture then I have to reduce the alpha value on that texture which would then result in fillrate. As my target is mobile, I quietly want to do it without using a texture.
you can probably use an image effect to do this… since other than that any pixel you place on the screen is essentially a texture. but for Free users Textures is probably the only thing you can do.