Having followed the whole "Delete to change the sprites" thing, sometimes it just doesn't want to work.
Breathing new life into classic NES games by magically converting it into 3D and letting you play in VR · By
reposted and updated with links to examples on both RCR and Bionic Commando
I'm having a similar problem, I can't seem to get the delete option to work. Every time I use it the object can no longer be rendered in anyway, I get an "instance does not exist" error and the object remains one solid piece but the whole piece can be moved from front to back. I'm editing shatterhand, on 2 stages there are things in the background that won't separate and others where I'll edit a piece in the background but if a similar part that looks identical to it in the foreground, even if it's a different color it pop out into the foreground. On the under water portion there are sections where 2 different pipes intersect, 1 in front the other is part of the background but it seen as 1 piece and delete does not work o it