Hi
After installing SP3 (or SP3a) vray renders exactly the same file very differently to SP2. Please see the attached images.
The problem happens on geometry with flipped and double faces when using irradiance map.
Sp2 didn’t have any problems with that. All I had to do was to use 2 sided material and increase “secondary ray bias” to get clean render. But in SP3 the same file renders differently, with dark blocks caused by double/flipped faces.
Something changed in sp3 that causes the irradiance map to calculate differently. Is there some setting I can change to get the irradiance map in sp3 calculate the same way as in sp2? Should I do something with the material? Fixing the geometry is not really an option.
Thank you.
Marek
Ps. The images are rendered with fairly low settings. Going to high makes the problem less visible.
Is there anybody out there able to offer some kind of explanation or solution to this strange problem with SP3 that we are experiencing?
Would more detailed description of the problem help?
Hello Marek,
we got a similar problem here.
We are in jobs like mass-visualisations for catalogue and started this on SP1.
Now we bought vray rt and need to install SP3. But in a short test our reseller found out, that the results are different between this two versions.
Now we have to stay on SP1 and leave the rt on harddisk.
sad about it.
regards,
Stefan
Hello Paul.
The Problem is not only one specific scene, but the renderengine itself.
It is a problem if you cant get exactly the same 2 years later, cause you updated your renderengine.
If there is a solution it would be very nice…
best regards,
Stefan
Paul
Thanks for your offer to help. At the moment we are trying to debug the scene by ourselves. With some results.
What happens is, when we render the scene created in SP2 with SP2 the result is image 1 (see below).
When we render exactly the same file (nothing touched) in SP3 the result is image 2.
In order to get clean render in SP3 I had to merge all the stuff to a new file, then bingo! (img.3)
This is very strange for renderer to behave so differently from one service pack to the next. I can only hope we will not have to go through this process too often.
Marek
3D Betrieb,
Hm maybe… But rendercore is being updated with new features. It rapidly evolves. I’m sure you can get the 'old-look ’ in a short time
marek.kowalski,
Well me personaly can’t tell you what’s wrong just by looking at the pics you provided. Crop some stuff and up it here, so the whole vray community can help ya
settings are in the file yes - maybe sp3 translate some values incorrectly
all I can imagen is a unite scale problem or similar
so far I support sp3 noone ever reported such a problem
can you try to lower or rise the “seconday ray bias” in vray
are you using GI “from file” made in SP2 and reuse in SP3?
disable GI and compare render again
