This was originally inspired by some crypts in "Tiny Tina's Wonderlands". I tried a mix of procedural and height maps extracted in Zbrush to see if I could finish this faster, but I took a 3 month break before finally coming back and finishing it. I used 'Cracks Generator' from Jérémie Makuchowski https://jeremiemakuchowski.gumroad.com/l/FKwXy