iamnoel Posted March 29, 2003 Share Posted March 29, 2003 I am curious with all the talk bout HDRI can we achieve a really good high quality image? If so what renderer is good and can anyone post maybe an image to compare with using HDRI based rendering compared with GI rendering or ray trace. Can we mix both HDRI with GI rendering? or raytrace for that matter? thanks really considering on which third party renderer to acquire. iamnoel Link to comment Share on other sites More sharing options...
STRAT Posted March 29, 2003 Share Posted March 29, 2003 try the Brazil r/s for viz, thats got a nice hdr plug in. go see these guys' galleries, they'll show you what you need to know: http://www.nikclark.com http://www.trinisica.com/ Link to comment Share on other sites More sharing options...
iamnoel Posted March 30, 2003 Author Share Posted March 30, 2003 Thanx for the reply strat,i want to be able to produce images with the quality of some of the artist here but does anyone actually use HDRI with their renderring specially exterior views. or is even advisable to use HDRI maps? Because looking at the sample images they look incredible really realistic. thanx a lot for your advice. iamnoelr Link to comment Share on other sites More sharing options...
plastic Posted March 30, 2003 Share Posted March 30, 2003 maybe i am wrong, because i didn't really try hard yet, but hdri seems incredibly slow to me. i tried it with the brazil 1.0 demo and with vray... to get rid of noise (which is far stronger than with simple lightsources or skylight) i had to increase the samples to a point where speed wasn't longer acceptable. i'm talking about rendertimes > 6 hours for a screen sized image. people said to me that noise isn't a big issue, since textures hide it, but most of the surfaces i use are white walls. i can't use strong texture everywhere. Link to comment Share on other sites More sharing options...
ingo Posted March 30, 2003 Share Posted March 30, 2003 It helps if you slighty blur the hdr image to get rid of the noise. But take care if you use the same hdr image for environment reflection. Link to comment Share on other sites More sharing options...
iamnoel Posted March 31, 2003 Author Share Posted March 31, 2003 Thanks a lot for all your reply i was really wondering whether it was worth the investment specially with all the cds coming out was hoping to cut down on rendering times and tweaking on my light sources. anyway You all have been a big help. iamnoelr Link to comment Share on other sites More sharing options...
STRAT Posted March 31, 2003 Share Posted March 31, 2003 worth the investment? i cant comment about hdri in viz/max as i dont use it in there, but i do use it in cinema4d. i only use hdri in cinema 4d, because i find absolutely NO slow down in rendering speeds. The hdri probes are easy to use and map. infact hdr usage is faster to use and set up than normal image based lighting sky domes. this is probably the only reason i use hdri - it's versatility, not it's so-called ultra realistic results. but thats just my opinion You'll have to test out brazil's hdri demo and judge for your self. Link to comment Share on other sites More sharing options...
PiXeL_MoNKeY Posted June 8, 2004 Share Posted June 8, 2004 If you are using VIZ 4 you may need the HDR plugin from Splutterfish: http://www.splutterfish.com/sf/sf_gen_page.php3?printer=1&page=plugins Also they have a tutorial on setting up HDR for GI at: http://www.splutterfish.com/sf/contrib/tutorials/gabry_hdri_tut/_contents/index.html I think VIZ 5 ships with the HDR plugin. While you are there you may also want to try out Brazil Rio (available off the first link I posted). If you have questions or need help feel free to drop by the Splutterfish IRC Chat. -PM Link to comment Share on other sites More sharing options...
Ernest Burden III Posted June 8, 2004 Share Posted June 8, 2004 hoping to cut down on rendering times and tweaking on my light sources. I think you ask a very good question--just because we CAN use HDRI in rendering, should we? So far I haven't. (That's not true, actually, I have used map-based lighting for pre-lim views, just not finals). HDRI is great for getting nice results without setting up lights. Getting lights adjusted can take many hours, especially running tests. So a simple setup saves time. Also, if you can use a program that can save a lighting solution you are well ahead, time-wise, and renders will be quick. Its the light processing that takes a lot of time, not raytracing. Link to comment Share on other sites More sharing options...
jhaeusle Posted April 28, 2005 Share Posted April 28, 2005 Just wanted to add this adress for people interested in spherical panoramas and HDRI: short introdution and explanation about HDRI To see some Render-Examples, go to: Render Gallery or have a look at the following Panorama-PDFs: URBANbase SNOWbase SPRINGbase HDRIbase_Vol-1 HDRIbase_Vol-2 HDRIbase_Vol-3 Link to comment Share on other sites More sharing options...
seismograph Posted April 28, 2005 Share Posted April 28, 2005 To cut down the rendertime with vray (and maybe other renderer too) just make your hdr smaller! this is an image with 1024x512px hdr image: 4:20min this is the same hdr with 128x64 px: 3:54min ..and this one is the same from above(128x64px) but convoluted: 2:48min The result is at least similar ...lowsized hdr get convoluted and so the noise was gone too. By adding a key light you will get very nice and realistic results! well .. there is a project running since one year ..called "SDR loader" : http://sdr.cgtechniques.com/ Link to comment Share on other sites More sharing options...
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