Alright, here's my situation. I'm trying my hand at mapping, and everything worked before I tried to build a room with a customblocker specifying an image from the base game. Specifically, I want to put a poster_text.png on the wall. Do I have to copy poster_text.png somewhere in my mod's file structure, or is there some way to specify the file path that will tell the game to look for it "dungeons of dredmor/dungeons/poster_text.png". Just specifying "dungeons of dredmor/dungeons/poster_text.png" in the png="" field doesn't work. Is there some way to do that, or am I just going to have to copy files from dungeons of dredmor into the mod, bloating the file? (I also don't want to do that because I plan to use images from the expansions, which is probably skeevy from Gaslamp's point of view.)
Leave off "dungeons of dredmor" in your path: it assumes that unless told otherwise. Should just be dungeons/poster_text.png. Basically just look at the formatting in the game's rooms.xml and copy theirs.
Fax. I did that. I added to the XML file. It crashes when I try to test the room; it lets me make a test character, lets me get through the splash-screens, then crashes the moment it would be putting me into the game.
FaxCelestis: Thank you, that was the problem. Stupid ampersand, why can't you just work? C'est la vie. Essence: Thanks for catching that for me.