Vray animation prepass problem

[mkellyanimated]

Hi,

 

Thank you in advance for replying to my question!

 

I am doing the GI prepass for animation using Irradiance map as my primary and Light Cache as my secondary.

Everything works out fine it seems and looks great at the end. However the prepass is going through all my frames twice. Meaning that it prepasses all 234 frames once, then goes through and does it again. It slow enough on my computer just for one pass through, but having it be two is causing it to take half a day. I did this method on another project before without an issue or having it run through twice, but on this one it alludes me to why this is happening. I keep thinking that it is some option that is maybe causing this. I hope this explanation makes sense, it's a little hard for me to articulate it into words, exactly whats going on, please let me know if this is confusing and I can try and explain it better.

 

Any ideas on why it is doing this would be greatly appreciated.

 

Thanks again!

[Jason Matthews]

So is it rendering the IR Map twice or the LC Map twice? Are you running the LC first as primary and secondary and then switching it to secondary from file to run the IR Map? Can you post screen shots of your settings?

[mkellyanimated]

Hey thanks for the reply.

 

It's rendering the IR map and LC map twice. As in it goes through the complete timeline rendering out the IR and LC and then goes through again and after the second time is when it says the render is complete. I am doing them together. I tried them separately and it gave me weird results. So I decided to do it together because I figured since I was going to render using them together I might as well prepass them together. So just to clarify I am running the IR map along with my LC (IR as primary and LC as secondary) when I am doing my prepass renders.

 

I also don't know how long it is usually supposed to take, if it is supposed to take a while, usually, to do this prepass stuff or if it should usually be taking a relatively short amount of time. For instance I set off a prepass after my first one messed up and it is taking 4 hours for 150 frames. Now I don't know if that is good or bad, but if that is the case you can see where it going twice through would present a serious time issue.

 

Here are the screenshots from my render settings hopefully they are legible and helpful

[Jason Matthews]

I think what you might be seeing is the light cache running for the entire sequence and then adding frame by frame.

 

 

Jason Matthews