It's not really a Meter per Texel Question, more a number of lights and level complexity matter IMHO.
I use 512*512 for all Indoor Levels, this works pretty good. At least in Maplet I found it's looking better when the texels are not too small so their contours are softer.
I use 512*512 for all Indoor Levels, this works pretty good. At least in Maplet I found it's looking better when the texels are not too small so their contours are softer.