Distibuted render is patchy

[YOHKOH]

Any advice on this one?

 

When rendering to 4 workstations I am getting patchy results on the render but only in certain areas. The patches follow the line of the buckets so it looks as if each PC is rendering out to slightly different settings. Any solutions? Also the patches repeat in the same place if I re-render, but move to a different location is I change the image size

[lambros]

if you see textures missing from several buckets, just copy all maps locally for each workstation.

I have seen this problem with different cpus, sometimes intels would bring different buckets from amds. But I didn't find any working solution other than to give up bucket dr

[YOHKOH]

Gave that a go and saved a maps to the server, this sorted out some areas but there seems to be a further problem in areas where no maps are involved. Looks like its working out a different GI solution depending on the PC.

[lambros]

it seems that this problem arises from the biased GI solution. but then again, has someone worked this out? I mean, then why give the dr thing if it can't work properly?

[alias_marks]

ya you know I've come across this porblem too. What a drag if you ask me. But sometimes it works perfectly and all machines seem to come up with the same solution and there's not problem. Other times it gets blotchy around the buckets like you're describing.

 

Yes, I've heard that to fix this you can pre-calculate the IR and LC maps and use them once you save them to a hd, but this takes extra attention and monitoring which isn't all that productive sometimes. Would love to hear an explanation if anyone knows more about it.

 

Mike

[andreg]

I had a similar problem before when rendering with DR (max9 v-ray1.5). I noticed that the maps were all there but some bucket were brighter than others. Turns out that the ies files for the lighting werent linking for some nodes, I just relinked and everything was fine. So if you have any ies files in your scene, check that issue out.

 

My 2 cents

[alias_marks]

Ah, that definitely describes my problem. The scene I was having trouble with did have IES files and the ones that worked fine didnt' have them at all. Strange.

 

One thing to make sure too is that you use the UNC file paths if you have your files on a server and make sure they're not pathed just by drive name.