Hi Emily!
Right now, I have the exact same problem you had! I studied the tutorial that seemed to have helped you but I can't figure it out. My rasterlized layers suddenly disappear - and I can't find any system behin that. Can you PLEASE tell my which buttons you clicked on to keep the layers rasterlized AND in 3D-space. It would help me so much. Thanks a lot and I hope you find the time to answer this soon.
Cheers and all the best, Rainer!