Techniques: fractal gyroid or something, raymarching, shading based on the number of steps, a*(1 + b*dist^2) glow, glitchy reflections.
Requires enough video memory for 1024 x 768 x 32bpp video mode; dosbox does not support this. Use dosbox-x, with:
vmemsize = 4
greets: superogue, TomCat, gopher, teo, kk, yzi, HellMood, psenough, jeenio, Rrrola, p01, apollo, okkie, exoticorn, baze, Virgill, byteobserver, ferris, Ped7g, Dresdenboy, aldroid, hannu, wrighter, dave84, havoc, unlord, noby, LJ, PoroCYon, sensenstahl, Blossom, deater, ilmenit, Fready, Jin X, gasman, DevEd, teadrinker, garbagetruck, Pellicus, GoingDigital, las, mentor, iq, blueberry, fizzer, gargaj, pOWL, silvia, MartiniMoe, hitchhikr, NR4, jobe, kusma, grey, LLB, emoon, critikill, rez, stahl, psykon, unlock, hoffman, mrvux, artlace, 0b5vr, emufreak, depeche, shana, wbcbz7, nesbox, bitl, gigabates, and mantratonic & everyone at the Sizecoding discord!