martin walker Posted November 22, 2009 Share Posted November 22, 2009 Im trying to speed up the raytracer in vray. I've some mirror like objects in my scene that have been excluded from GI but they take an age to render. Ive resorted to rendering them as scanline an comping them in....but its a real bodge job any help appreciated Link to comment Share on other sites More sharing options...
Ricardo Eloy Posted November 22, 2009 Share Posted November 22, 2009 Try decreasing the maximum depth to 2. Also make sure you are not using glossiness (it doesn't make the mirror look any better and takes ages to render). Another thing that occurs me is that maybe the mirrors aren't the source of the problem, maybe it's what they are reflecting. Link to comment Share on other sites More sharing options...
martin walker Posted November 22, 2009 Author Share Posted November 22, 2009 Thanks Rick will give that a try Link to comment Share on other sites More sharing options...
Ricardo Eloy Posted November 22, 2009 Share Posted November 22, 2009 By not using glossiness I mean leaving all glossiness values = 1.0. Link to comment Share on other sites More sharing options...
martin walker Posted November 22, 2009 Author Share Posted November 22, 2009 Hi Rick yeah, tried that, traces down to 2....no difference. I will have a proper look tomorrow with fresh eyes Link to comment Share on other sites More sharing options...
zhopudey Posted November 23, 2009 Share Posted November 23, 2009 Does the rendering speed up if you turn off reflection for the mirrors? Link to comment Share on other sites More sharing options...
martin walker Posted November 23, 2009 Author Share Posted November 23, 2009 its a big array of a few thousand small "mirrored" panels. Flies when scanlined rendered, but really slow in v-ray. Link to comment Share on other sites More sharing options...
zhopudey Posted November 23, 2009 Share Posted November 23, 2009 What I meant was, have you isolated the problem lies with the mirror material? If you change the material, does the render happen faster? Link to comment Share on other sites More sharing options...
martin walker Posted November 23, 2009 Author Share Posted November 23, 2009 yes, its definitely the material. Link to comment Share on other sites More sharing options...
zhopudey Posted November 23, 2009 Share Posted November 23, 2009 Well, what are your material settings? I use diffuse = black and reflect = white, and never had any problems. Link to comment Share on other sites More sharing options...
kid84 Posted November 23, 2009 Share Posted November 23, 2009 i thought raytrace cant be used in vray? Link to comment Share on other sites More sharing options...
Stephen Thomas Posted November 23, 2009 Share Posted November 23, 2009 Just to be clear, you aren't using a raytrace map in your reflection slot are you? Link to comment Share on other sites More sharing options...
martin walker Posted November 23, 2009 Author Share Posted November 23, 2009 no its a standard vray material no glossiness, my issue is that scanline rendering it is infinitely faster than rendering it in vray. As there is no GI on the part of the model (just straight reflection) I cant understand why its so slow Link to comment Share on other sites More sharing options...
Nic H Posted November 23, 2009 Share Posted November 23, 2009 attach all objects into one. Link to comment Share on other sites More sharing options...
aristocratic3d Posted November 23, 2009 Share Posted November 23, 2009 Could you please upload the material editor settings? Link to comment Share on other sites More sharing options...
raq007 Posted November 23, 2009 Share Posted November 23, 2009 Also can u show us ur scene's pic? Link to comment Share on other sites More sharing options...
kid84 Posted November 24, 2009 Share Posted November 24, 2009 hmm... im sorry, i thought he was talking raytrace map here... i guess im kinda confused. can someone explain what is raytracing here refer to? or what it means actually? Link to comment Share on other sites More sharing options...
Dave Buchhofer Posted November 24, 2009 Share Posted November 24, 2009 I'm going to hazard a guess that you're using the Adaptive Subdivision Image sampler? There are quite a few things that can cause a slowdown in a localized area, but first thing i would try is some experiments with the Adaptive DMC image sampler, its quite a bit more forgiving speed-wise If possible a screenshot or a render of the scene would go a long way to helping diagnose what could be wrong Link to comment Share on other sites More sharing options...
manta Posted November 25, 2009 Share Posted November 25, 2009 hmm... im sorry, i thought he was talking raytrace map here... i guess im kinda confused. can someone explain what is raytracing here refer to? or what it means actually? ray tracing is a technique for generating an image by tracing the path of light through pixels in an image plane... most render engines do this...MR, VRAY, FinalRender, Brazil and so on... Link to comment Share on other sites More sharing options...
kid84 Posted November 25, 2009 Share Posted November 25, 2009 ray tracing is a technique for generating an image by tracing the path of light through pixels in an image plane... most render engines do this...MR, VRAY, FinalRender, Brazil and so on... hmm... from what u said, i guess i can conclude that all render engines that do GI rendering are using ray tracing method? damn, i've been using vray for 4 years yet i dont know what im doing is called ray tracing. LOLOL!!! =__= Link to comment Share on other sites More sharing options...
Stephen Thomas Posted November 25, 2009 Share Posted November 25, 2009 While it is true that there is no GI on the mirror object itself there is in the scene that it's reflecting. I really feel it is the reflected scene that is giving you problems rather than the mirror objects themselves. It's hard to say without seeing what your scene consists of, can you post some screen grabs/renders? Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now