Message #237024

[Runer112]

That's because when you're scrolling the screen left, the image is following the shifting of the grayscale dithering mask, so grays get stuck on the same dither pattern for multiple frames. The "proper" way to fix this would be to display each frame three times, so every frame is displayed with all three dithering masks. This should look much nicer, but it would add a lot of time to each frame. The "improper" way to fix this would be to account for the amount the screen has scrolled when shifting the grayscale dithering mask between frames, so the image doesn't follow the mask. I would do this by shifting the grayscale mask right instead of left (or left twice) if the screen has scrolled one pixel to the left since the last frame.