Pilsu - Which of my suggestions contradict reality? The only one I can see is the bit about being able to launch barrels of water and them not freezing until they shatter... while this isn't realistic, it fits with the way Dwarf Fortress works as things are now.
TheyTarget - A good point, but the fact that they don't vomit until cave adaptation sets in suggests that the sun doesn't bother them... atleast initially. Dwarves would certainly see better underground than humans or elves, but they still wouldn't be able see everything. Perhaps a Dwarf could see a maximum of 20 tiles in any direction but a human or elf could only see 10. Though I've never actually played, doesn't D&D's darkvision have a limited range... 60 feet or something like that? Perhaps having a decently lit fortress could help Dwarves spot stealthed units or improve trade relations by making guests feel more welcome. If nothing else, a source of fire would be needed for burning ammo.
Yeah it does have a set vision limit. But with some creatures, with darkvision, and low light visions. You can get instances where I can see with the torch lit 60 feet, but if I put it out I see 120 feet.This would be simply because the touch light only goes 60 feet so low light wouldnt help me past that. Also usually eyes cant see both in the dark and light at the same time as far as I know, you know if your standing in the light you can only see the light, if you're in the dark you see everything. Also in DND, there are creatures that 100% live in the dark caverns so light never touches their eyes. But yeah, better fire, and cats, and dogs cant see in complete darkness anyways. I would have got back faster sorry.