braddewald Posted December 4, 2009 Share Posted December 4, 2009 Is it just me or...does Vray RT kind of suck. Every time I get the lighting and everything tweaked in the RT viewport just like how I want it, I hit render and bam! the light cache starts cranking out something way brighter, or way darker or something else. I love RT in theory but in practice I can't seem to get it to do me any good. I always end up adjusting it after RT to something completely different that looks good as a final render, but does not look anywhere near the same in the RT viewport. Anybody else experiencing this? Link to comment Share on other sites More sharing options...
mattclinch Posted December 4, 2009 Share Posted December 4, 2009 (edited) Interesting considering it was suppose to "revolutionise" or "kill" our industry.... Edited December 5, 2009 by mattclinch Link to comment Share on other sites More sharing options...
Trick Posted December 4, 2009 Share Posted December 4, 2009 (edited) VRay RT is not GPU based !! It will be in the future, but currently it is NOT ! You have to realize though that if you want good results that are comparable with the final render, you should use QMC methods as much as possible, since that is what RT is based on. Specially Light Cache gives quite different results and even IRR Maps are different since RT does not take the inclusion of VRay Lights stored in the IRR Map into account !! These are just the current limitations, so if you know them and live by them you can be very happy with them Edit: just wanted to add that a lot of peoples concerns are being worked on, including the above ! Edited December 4, 2009 by Trick Link to comment Share on other sites More sharing options...
WAcky Posted December 5, 2009 Share Posted December 5, 2009 I get the same looking render as I do in RT. I've seen threads about ppl saying this on the chaos forums. Might be worth a look there. Link to comment Share on other sites More sharing options...
mattclinch Posted December 5, 2009 Share Posted December 5, 2009 VRay RT is not GPU based !! It will be in the future, but currently it is NOT ! apologies! will edit my first post accordingly. Link to comment Share on other sites More sharing options...
Thablanch Posted December 7, 2009 Share Posted December 7, 2009 I get about 95% same results with RT than with the normal render engine. - RT worls in linear mapping mode, so if you are using something else as color mapping, you will get a different result. (exponential and so on..) - Of course, if you are working in LWF, you need to adjust your Vray RT workflow. - Mesh lights are not supported. - Proxies are not supported. so if you have 75 trees, casting shadows, light is going tro be different. - Some maps are not supported. If you have a dark procedural map, but the base color under is white, output won't show the same. Link to comment Share on other sites More sharing options...
Devin Johnston Posted December 7, 2009 Share Posted December 7, 2009 I've been unable to get RT to match up to my final rendered images as well and despite trying many different methods it's never worked. I think it's a great idea that needs further development, hopefully when the GPU version comes out they will have most of this fixed. Link to comment Share on other sites More sharing options...
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