Finally got around to adding those few lines of code to add textured walls to the ray caster. A few details: The texture isn't mine, I merely found it via Google Images with the term "wall texture" and it has the filename Wall_Texture_by_shadowh3.JPG There's still a problem with the corners of the grids having a weird fringe. It's better than it was, but still not right. Haven't tracked that down yet, but have some ideas The somewhat hybrid mix (Courtesy of XNA) of performing the ray casting…