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 GameDev.Net Discussion Forums  Image of the Day Fake HDR - LightingSend Topic To a Friend | View Forum FAQ | Track this topic | View Forum |
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| Fake HDR - Lighting |
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  Arex Member since: 7/1/2004 From: Helsinki, Finland |
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 Fake HRD - Lighting in GeForce4 MX440, using Dawn Bringer 3D Technology. Details : - Vertex shader lighting (hemisphere), one directional light - Only the models are rendered twice, first to make the mask, and then normal rendering - Ran about ~20 FPS, I optimized the model so that it contains about 3000 tris - 2x quads = background and mask Limits the rendering speed : software processing (GF4 MX440 doesn't support shaders in hw). Anyway, I was pretty suprised how good looking it can be in GF4 MX 440. Note : Doesn't need shaders to use. Feel free to comment. Sincerely, Arto Ruotsalainen Dawn Bringer 3D - Tips & Tricks |
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LJ_1102 Member since: 2/16/2006 From: Hamburg, Germany |
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Posted - 3/12/2006 2:17:12 PM |
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| Its hard to see the HDR, because the whole image is so bright. Maybe you can make a kind of cave and then the sky so we can she how it is. to that one screen i can say that it looks nice, but the HDR isnt easy to see. To the whole scene, really nice work the Speulat etc. So try to strange up the HDR effekt. |
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zedzeek Member since: 7/8/2000 From: nelson, New Zealand |
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Posted - 3/12/2006 2:37:45 PM |
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| nice style, though i admit i dont see any HDR just a bloom. also is there a need to optimize models any more eg on my gf2mx (slower than a gf4mx) i could hit the maximum of 20mil/sec. (im struggling to get half that today on a gffx5900 :) ) personally i would waste time implementing stuff that u will change later on, when u get a new card. ive been down that road before eg texture combiners -> register combiners -> shaders. implementing shadowmapping on the gf2mx etc. whilst it was fun at the time, it wasnt productive. btw im not knocking it, just hoping to save u some effort. Captain Courgette, eat more veg |
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Arex Member since: 7/1/2004 From: Helsinki, Finland |
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Posted - 3/12/2006 2:44:54 PM |
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| True, but it's easy to optimize the models in model editor, so it doesn't cost me any time really. HDR - lighting is hard to see because there aren't any enviroment really and because it's fake (almost like in the Shadow of Colossus). :) Thanks for feedback. Sincerely, Arto Ruotsalainen Dawn Bringer 3D - Tips & Tricks |
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DrGUI Member since: 10/20/2003 From: Sunningdale, United Kingdom |
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Posted - 3/12/2006 5:32:58 PM |
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| Hey It looks sweet! How did you do bloom on the glow sources without pixel shaders? I just disabled the glow if pixel shaders weren't supported :P |
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Arex Member since: 7/1/2004 From: Helsinki, Finland |
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Posted - 3/13/2006 9:01:31 AM |
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| In this shot there are bloom & HDR - lighting really, bloom is just reverse mask basically from what I use for HDR. I'll try to make some better screens about HDR when I'v got more time. For bloom and for HDR : Just make a mask (black & white), render scene to small texture, for example 64x64, then scale it big, bilinear filter will do some tricks, but notice that only with bilinear filter mask is blocky, so I suggest doing blur too. Bloom = affects to whole model HDR = comes from the enviroment - "from background" Sincerely, Arto Ruotsalainen Dawn Bringer 3D - Tips & Tricks |
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Ravyne Member since: 2/26/2007 From: Kirkland, WA, United States |
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Posted - 3/13/2006 11:31:56 PM |
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| If you happend to read the recent article about some of the programming tricks used for Shadow of the Colossus that was published recently they used pretty much the same process to fake HDR in their game on the PS2: Render scene, masks. downsample/blur mask. combine. Keep up the good work. |
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e-u-l-o-g-y Member since: 8/3/2005 From: Oslo, Norway |
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Posted - 3/14/2006 2:29:47 PM |
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Quote: Do you have a link? I'd like to see that one! |
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eSCHEn Member since: 4/19/2003 From: Dumfries, United Kingdom |
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Posted - 3/15/2006 10:21:13 PM |
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| It was news item a while back, here's a link to the story. -- Cheers, Darren Clark |
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Steadtler Member since: 1/31/2002 From: Montreal, Canada |
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Posted - 3/20/2006 8:22:05 AM |
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| Its hard to make the difference between bloom and HDR in a screenshot (because of the dynamic :P), but that look real nice. |
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Arex Member since: 7/1/2004 From: Helsinki, Finland |
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Posted - 3/20/2006 11:07:14 AM |
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| Thanks for feedback. :) Sorry that I haven't had time to reply, I'v been sick and lots of tests at school (final year). And I think I finally found a job from Hybrid Graphics. Sincerely, Arto Ruotsalainen Dawn Bringer 3D - Tips & Tricks |
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