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from mentalray to Vray
http://www.nzcgi.com/viewtopic.php?f=21&t=3542
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Author:  ra8id_ra88it [ Mon Jan 21, 2013 5:36 pm ]
Post subject:  from mentalray to Vray

it's been a while since i needed help and someone going through my scene to tell me where im going wrong, and i dont like it seems like a massive step back.

Recently i have decided to make the switch to vray and i think i spent a total of about 10 hours getting my self familiar with the render globals, and vray lighting, there is much i have yet to explore but the issue im having at the moment is grain, no matter what im trying to do i cant get rid of the grain in my render can someone please take a look at my test scene and tell me what whats wrong and what i need to fix i would greatly appreciate it


Ps i know they key light needs to be stronger :P

Attachments:
render test.zip [9.54 MiB]
Downloaded 128 times
Vray Lighting Test.jpeg
Vray Lighting Test.jpeg [ 379.71 KiB | Viewed 2461 times ]

Author:  kurtAdams [ Mon Jan 21, 2013 8:57 pm ]
Post subject:  Re: from mentalray to Vray

At school we never got the adaptive dmc working right, using the adaptive dmc we always had grain even when trying the nederhorst settings. you can try these settings but to reduce grain the render times got really expensive, i've used here adaptive subdivision and turned of the light dome, sorry i'm not sure how to use em, i've turned on irradience for some indirect illumination, its a bit much and would be better with another fill light then letting it assist a little, I've got my gamma muddled up, i'm used to exr's and hdr for the reflection maps i'm a little rusty on my 2.2's :)

not sure if that helps :) its just the way I would approach the scene with what I know. the quick renders below show just the key light, then irrandence , then a crude shader. The blotchyness in the shadows can be fixed by raising the irradience map samples.

this is a really helpful vray help file site to have near by
http://www.spot3d.com/vray/help/maya/150R1/

you could try looking at these nederhorst settings
http://3dlight.blogspot.co.nz/2010/10/v ... tings.html

Attachments:
reflection_gammaBad.jpg
reflection_gammaBad.jpg [ 39.1 KiB | Viewed 2453 times ]
keyLight_indirect.jpg
keyLight_indirect.jpg [ 49.98 KiB | Viewed 2453 times ]
keyLight.jpg
keyLight.jpg [ 49.46 KiB | Viewed 2453 times ]

Author:  ra8id_ra88it [ Tue Jan 22, 2013 10:08 am ]
Post subject:  Re: from mentalray to Vray

thanks sooo much kurt, i have no idea why so many tutorials were telling me to use the nederhost settings, it was grainy has hell and the render times were double what i got now from following your settings.

Attachments:
AWSOME.jpeg
AWSOME.jpeg [ 103.48 KiB | Viewed 2445 times ]

Author:  kurtAdams [ Wed Jan 23, 2013 9:10 am ]
Post subject:  Re: from mentalray to Vray

glad it was helpful, i'm curious about other peoples render settings with vray, I feel with the adaptive subdivision and changing the 0-2 it feels like mental ray and kinda helped me relate the two.

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