Darker buckets

[mgibeault]

I'm still using V-Ray 1.05.29 for this job and I encounter a problem that is mentioned several times on the forum but I haven't found a solution.
I get some buckets darker than the others. That is on a material that has no texture maps and DR is not used.
Any idea on how to get rid of them?

Thanks,

-Marc

[fooprobe]

Very strange. Sounds buggy. Can you post the file?

[mgibeault]

Here is the part where I see the darker buckets.
From one render to the next it's not always the same buckets...

dark buckets.zip

[fooprobe]

here's what i get when i just open and render this file:



no problem with darker buckets. I ran this on a realllly old 32-bit dual core machine with 4 GB RAM, so it's probably not a hardware issue (unless you're running something older or less RAM =).

your settings seem to be unnecessarily high, but again it shouldn't cause problems unless you're running a machine with less RAM.

I'm stumped. Are you able to get any clean renders from any other file?

[fpedrogo]

The only time that I have seen the darker bucket is if you have a different version of the DR Spawner in your slaves machine. You should use the same installer as in your main computer.

[mgibeault]

DR is turned off!

[mgibeault]

Your image is quite different. Did you change the settings? Or is it that the maps you don't have?
Here is my result of the same file. As I said, the darker buckets appears at random places from render to render.
Do you want me to send the map file too?


Here are the maps anyway;
maps.zip

[fooprobe]

Indeed, DR is off in the file. but oops, I'm running Vray 1.50, probably accounts for the difference in the image. I thought your original post said this happens with no texture maps applied. Try using override materials in global switches and just use a simple color. I don't have 1.05.29 installed anywhwere any more so I can't check it. But if you only get this happening with maps on, it's surely a problem with one of them. 1.05.29 had problems with non-RGB images and jpgs saved as progressive scan.

Edit: but of course that's not the issue with the images you're using. Not sure, maybe someone still running 1.05.29 can help test it.

Also I noticed you have IRMap set to incremental add. Are you saving/loading IRMap? Long shot but maybe switch to single frame.

[mgibeault]

I tried with IRMap set to single frame and I still get darker buckets.
It may be map related but how come a bucket is fine while the other is not? A CPU core finds the map and another one does not? How is this possible?
And I'm not the first to have this problem: http://www.chaosgroup.com/forums/vbu...-Weird-Buckets
Thanks,
-Marc

[renee81]

Just a question,why are you still using vray 1.05 ?

Anyway it has to do with your double reflectivity layer in the fuselage material,remove reflection 1.and it work fine.

I tried it on an older computer which still have rhino 4 and vray 1.05 on.

[mgibeault]

Yes, we must use 1.05 until some projects are finished.
I see that the problem goes away if I remove the second reflection layer but then the material is quite different. I have to replicate a real-world paint and this material was quite close.
Thanks anyway.

[Micha_cg]

Good to know the reason for this bug, I have seen this problem some times too. Maybe it helps to set an other cutoff at the material options.