No more compromises and workarounds like Ben's article (https://medium.com/@Powersaurus/3d-floor-rendering-in-pico-8-a01f241db98d). The new tline() function simply lets us draw one row at a time instead of one pixel.
@CandyColt_Games it's documented in the manual
https://www.lexaloffle.com/pico-8.php?page=manual
One thing to keep in mind is the texture coordinates are in map cells rather than pixels (fraction numbers are okay)
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