Custom Projectiles Won't Render

[_@/]

I was tinkering with the doom source code (doom retro specifically if that helps), but ran into a roadblock. I was trying to add custom projectiles, but everything I add refuses to render no matter what sprite I use. It isn't that they aren't spawning because they still make noises and deal damage. It isn't an issue with the graphics I added because they render correctly when applied to something else. I've fumbled through several .c and .h files now and I still haven't found what the issue would be. Could somebody who knows what they're doing please point me in the right direction?