TintColor determines by what factors the RGB channels of pixel colors are scaled. The effect is multiplicative, so changing this to
(255, 0, 0) (red) would cause the green and blue channels to be multiplied by 0. This works similarly to how
Drag the slider below to see how a red (
Color3.fromRGB(255,0,0)) TintColor affects this scene. Notice how blue and green colors become very dark.