I wont argue on it Jav, But making a layer filling up the entire 1024x1024 will make it un needed big. I select the parts I want to paint. Move the selection out to where I have my metallic paint and copy that selection and move back to the car photo and paste. It's a lot of areas that dont need paint. I even deleted metallic paint under other marking and when I was done I had a metallic painted car down to 1MB, but I have my tricks to make things small in Photoshop.
Still wont download those files, I actually think base color is better looking on the cars around me as I never studied them. It's nice to see custom paint, but if a car is having metallic or not will not be seen on my screen. Turned off shadows to render the pixels in a pace I wanted. Three screen setup is a bit heavier on the computer than one screen. I can of course go all in with full details, but I want to be able to go around turn 1 at spa (GP) and still see the cars around me. With one screen I had like 120+fps there.. 3 screen on high detail.. wow 30 and the screen tear up like crazy.
So metallic for me look rather ugly, plain colors looks better.
Just hope iRacing wake up and start using DirectX11 and 64bit so I can take advantage of my computer