
Originally Posted by
Midgardsormr
I'd go twice that size, just in case a user wants to print at a higher resolution. A one-inch mountain is probably sufficient for most uses, but it never hurts to be prepared for bigger ones. And since it's much easier to scale down than up...
I'd say a good rule of thumb for sizing raster assets should be to assume that it will be printed at 300 dpi, then set your pixel size a little higher than what you anticipate people will actually want to use. It'll make your file sizes rather larger, but it will also make the collection more generally useful.
That's just my opinion, of course, and if file size is of primary importance, then the equation changes. I suspect, though, that at the size you're working at, you'll easily be able to keep the project under 1 MB, unless you make a lot of mountains.