I've started to work on some new maps, both small locations and buildings, including interiors, but I'm a total virgin with regards to VTT and battlemaps, so to speak. Are there any necessary conventions I need to pay heed to? I know the usual grid is 1 square Inch = 5x5 ft, but what's the DPI needed for digital battlemaps? What's the preferred file format? Are saturated colors prefered over desaturated ones (I know the reverse is true for most of the cartographers on this Forum with regards to larger scale maps)? Any tips you can give me, and advice or warnings?

Please, let me know!