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Linear god rays are a special case, one you see a lot more often because they're based on an exploitation of render buffer blurring, IIRC. You've probably seen games where the god rays disappear when the sun goes off the edge of the screen. They're basically bloom with a radial blur instead of a gaussian.
Global fog comes from just masking in a color based on the depth buffer, and volumetric fog (like quake3 pits) also just masks in a color but based on the difference between two depth buffers (the front and back of the volume). what metl and I are wishing for doesn't (yet) have a cheap implementation afaik. Raytracing will do it, but certainly not in real time, and piling up billboard particles slaughters you on fillrate. paging lordhavoc. Well, you can just take the light entity position and use that as origin for the radial blur, so you don't need to blur bright on-screen pixels a la bloom to get the effect. It's just less cheap that way.
A cool compiler trick for Quake might be something that builds a shadow volume during build and does some texture magic to avoid hard edges. Could then simply (cough) be rendered as an additive mesh ingame. Of course it wouldn't be truly volumetric. Another way I've seen them done is by billboards (taking slices along the length, bit like the shadow volume concept) and particle systems (point sprites scaling up in a cone like structure). The scientific term for them is "crepuscular rays" by the way, if you feel like Googling. Team Blur has also added them to their engine. http://www.moddb.com/games/overdose/videos/overdose-vidoc-light-shafts#imagebox For that kind of things, search for the oldest parts of portuguese cities, for example Porto or Lisboa. Valenca do Minho provides very good environments too, but of another type.
I know generally that the inspiration thread is for places but this guys character designs are so incredible I had to share -
http://tahra.deviantart.com/gallery/ These are the most valued resource on Fodrian and the inhabitants of the planet will die to protect them. Many of the tomes are written by human hand, although their original authors have most likely passed from the realm of the living. Others were driven mad by their discoveries or are unaware of the destination of their work. Many more of these somber volumes are the product of alien acadaemia; some are written on strange parchments of no earthly type, some on flayed skin, still others on bizarre metal alloys of indeterminate age and origin and some lore is even recorded in the medium of vividly colored liquid.
Some recent Kawaiik concepts from Niklas Jansson.
http://androidarts.com/kawaiik/Quake%20bunny.jpg http://androidarts.com/kawaiik/Quake%20bunny%204.jpg Mario 3 level design discussion:
http://www.significant-bits.com/super-mario-bros-3-level-design-lessons Could be monster_demon2, 3 etc.
Although the one with it's balls hanging off its face looks a bit suspect. http://img1.wikia.nocookie.net/__cb20111022183423/men-in-black/images/d/d7/Ballchinian_alien.jpg and cloisters and such.
http://www.hic-sunt-dracones.de/CCC2/burgen.php it�s a terrible site, i know, but there�s a bunch of breathtaking shots, for those who manage to navigate to them:) I saw those the other day and for some reason assumed I had gotten the link here, thus didn't post.
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