Well, I think it's awesome that somebody tried it. I'd feel bad if the creators saw this thread and felt like HN was rejecting their project or something. I was

Well, I think it's awesome that somebody tried it. I'd feel bad if the creators saw this thread and felt like HN was rejecting their project or something. I was just curious if anybody else felt the same way I did about how old games that lacked physics-based lighting seemed to look so good. My theory is that it has to do with how the the screen was always painted with such a bright and wide-ranging palette. One of the other posters described it well as a local optimum. With Doom-style sprites, the art team can decide exactly how the creature / object will look on the screen at render time. Once you introduce physics-based rendering, you always have to consider not just the color of the asset but also the texture, reflectance, and its surroundings (lighting, ambient occlusion, etc.). It's actually very similar to the difference between a painting and a photograph, now that I think about it. I guess what I'm getting at is that if you want each frame to be a painting in a physics-based rendering paradigm, it could turn out that this requires WAY more work to achieve because you have to contend with a combinatorial explosion of interactions between your many assets and light sources. I suspect some studios will assume that all they have to do is take some nice-looking assets and "bump the lamp", but I think ray-traced Doom is a big clue that that won't work out very well. And sure, it will be cool for a few minutes while you marvel at some effect that is only possible with a ray-tracer, but they won't get replayability for free out of that. After a while, the player will get sick of pitch dark hallways with swinging overhead lamps full of glowing crystals or whatever. My prediction is that ray-traced games may simply find a different approach to beauty. I'm picturing the difference between some renaissance masterpiece and a beautiful black-and-white photograph. Each pretty in their own way.