Preserving terrain rendering across maps

[Spannerbag]

Would this be essentially an overlay "at a greater height" as it were, so regular overlays would be "underneath" and still work?

Yes. It would be a purely visual effect.

Thanks for the clarification, much appreciated. Will have a look at the WML you mentioned.

Cheers!
-- Spannerbag

[beetlenaut]

Also the error implies (to me at least) that the map file was found, the contents inspected and the engine found a terrain code it didn't like?

No, that's not what happened. The map file was not found or inspected. The terrain code the engine didn't like is specified in the error message: the part that looks like the map file's name is actually the bad terrain code! You must have written the substitution incorrectly or made a mistake above that line that is affecting how the substitution is read. (That's what Soliton was saying, too.)

[Spannerbag]

Also the error implies (to me at least) that the map file was found, the contents inspected and the engine found a terrain code it didn't like?

No, that's not what happened. The map file was not found or inspected. The terrain code the engine didn't like is specified in the error message: the part that looks like the map file's name is actually the bad terrain code! You must have written the substitution incorrectly or made a mistake above that line that is affecting how the substitution is read. (That's what Soliton was saying, too.)

Ummm... right. Got it (finally) thanks!

Many thanks for your time, trouble and patience, much appreciated!

Cheers!
-- Spannerbag