Image style guide
From Simutrans Wiki
Simutrans graphic packages are often developed by more than one person, so style differences are common.
Still, there are some guidelines that must be followed in order to see your work included into Simutrans; among these you'll find intersting to preserve the scale, lighting, colouring in the images you create.
(NOTE (raven): just because I'm uneducated in wikis and nobody reads discussion, but there should be a brief paragraph for each set and I'm creating a link to Urban Renewal 64)
Simutrans world and screen geometry - picture.
