Thanks a lot for all your help! Now I know exactly what to do.
Hi, before the whole big wipeout of SMW I asked about FG and I got how to do it. I did the same thing for another level, but when I inserted the ExGFX files, the graphics glitch. I don't know what I did wrong:
I copied and pasted the FG tiles from the actual level onto a blank .bin file. I modified the tiles I didn't think I would use:
It's in the yellow circles
In LM, I click on the insert Exgfx and then Red Poison Shroom and switch to the ExGFX file and this happens:
Cutscenes are being worked on
1-1 to 1-3 FG/BG done,
1-4 FG is done, now for BG.
5-1 BG is done oddly early
1-1, 1-2, 1-3, 2-1, 2-2 FG done
1-1 BG done
Making my own FG/BG takes a lot longer than I thought.