Mapping Tips   1) Round some of the blocky details but only where it makes sense to. Like you wouldn't round a square beam, but you would round a blocky archway. 2) Light the levels from obvious light sources, unlike the original game which has lighting but often no light source (lamps, etc). 3) Please read Moondog's tutorial on mitre faces: https://jkhub.org/topic/10084-mapping-efficiency-mitre-faces/     Radiant Settings   I encourage everyone to use GTKRadiant 1.5, as that's the most common m