Make a pilar (Raycasting)

[Ageritno]

Hi everyone, i new at this forum and i want to ask something. This last time i was trying some raycaster codes, i was able to do the walls and textured walls, all based in Lodev's tutorials (https://lodev.org/cgtutor/raycasting.html) bute now, i want to convert some "wall boxes" in pillars, like a columns, not all walls at the same size. I was looking around this forum, another forums/pages, with no luck, i can't do it, mostly because i am not a super mathman and i just understand some parts of the raycast code, you know what i mean. I appreciate if someone with experience on this can give me a hand, i hope ir can be understandable, english is not my first language. Thanks.