I'm currently trying to make a weird adaptation of an original supcom map. The way to do that best is by making a new file and use an existing map (as opposed to truly making a new file, where you have to set the values of the size and the water depth etc.)
The advantage of this is that the exact water values are copied, as well as the lighting and the props, possibly also the decals (haven't checked on those). If you just make a new map with the same size and then import the elevation and strata .raw files, you have to set the lighting by yourself (I tried that and it still looked different from the original), and replace the props.
I have one big issue with the editor though. If I import the whole map when making a new file, I get stuck on saving it, with the error of write protection (obviously, you can't change the original files). I copied the whole stuff and removed the protection in the standard windows interface, but its still there somehow.
Does anyone have an idea on how to get rid of it?