Posted By
Murphy
on 2023-11-24
08:31:46
|  Re: Subpixel "rendering" CRT
Broadly speaking, yes, but I would like to clarify a little.
The subpixel rendering gives the illusion of smoother motion. Thanks to the half, quarter... pixel offset of the graphic data, you can position the sprite with more than just full pixel precision.
Look at this effect playing in slow motion, you can clearly see how the contours of the balls change.
https://youtu.be/3U5OLuLtz6Y?si=3uyNRqy-YGtPCGge&t=130
This is the effect used in the "highres" scroll in the Crest demo. 2 subpixel phases alternate per frame and scrolled by one pixel every second frame. This way your eyes are visualizing about double horizontal resolution there.
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