Light cache flythrough and batch render time

[francomanko]

So it seems that if i create a lightcache file using the flythrough option, when i start the render, it takes quite a long time to get going, the time taken is proportionally related to the amount of frames in the sequence. Is this normal, because i would have thought that being baked, it wouldnt matter.

Vray 3.6, Maya 2018.6

[yolov]

Yes, it's normal. That's what the fly-through does - computes the light cache for the entire animation to prevent flickering.
It's recommended to use it when only the camera is animated, so keep this in mind.
As a note - in the latest Update 2 to V-Ray Next we added a new light cache mode that handles animation a lot better without the need to use the fly-through mode.

[francomanko]

Hi, thanks for the reply, I just wanted to check i wasnt doing something wrong. Unfortunately next wasnt an option.

[francomanko]

Sorry the point i was making is that ive already made the cache file, and that it takes a really long time before the batch render actually starts, which kind of defeats the point of something thats cached surely. For a 600frame scene its taken an hour before the rendering actually started. If the frame range is less its quicker...still its pretty weird

[yolov]

Is the 'mode' set to 'from file'? Can you check the logs and see what's taking time?

[francomanko]

yeah is set to from file, i'll try to get some log info, but i think my scene has been royally screwed by mash an vray proxies, but probably best I post that in a new thread.