Use camera path

[lataf]

Can we "Use camera path" with the start frame end frame of Vray common and not for the animation time range in the interactive display ?

[tashko.zashev]

You can try to use "Set end time of the animation".
Start/end frame will not affect this option and the Irr map will be calculated for the entire camera movement.

[lataf]

yes I use that to limit the calculation of the use camera path option but the "Set end time of the animation" is not overridable and so I have to make two shot because my camera moving from "exterior to interior" and the parmetres are not the same

[t.petrov]

...but the "Set end time of the animation" is not overridable...

What do you mean by this statement? That it doesn't support render layers?

[lataf]

An exemple
I made it basic : I have a shoot of 200 frame of a camera going from an exterior to an interior. I have 2 Render Layer one for the exterior with specific GI and lighting ( render frame 1 - 110 ) and one for the interior with another specific lighting and GI render frame 90 - 200 ). No object move so I bake my IR twice with the Use camera path of the IR and LC and with option Don't render final image and that in 2 different file. I launch the render but the computation take care of the 200 frame and more than take more time to compute GI it add some trouble in it. So for avoid that I reduce the time range of my shoot before lauching each part of my GI ( 1 to 110 and 90 to 200 ) and that because I can t set a Layer override on the playbackRange I can t set it definitely for each RenderLayer and batch it.
But as I can set Layer override on the start frame and end frame of the vrayCommon I wonder if it was possible to make and option that made for the Use camera path consider the start / end frame of the vrayCommon and not the playbackRange
I don't know if my english was clear ^^
Lataf

[t.petrov]

Hm,

Are you sure that overrides don't work for these two attributes?
As far as I can see I can set overrides on both:

Render Settings -> VRay Common -> Start frame
and
Render Settings -> VRay Common -> End frame

[lataf]

sure I override this with no problem but I can t do that on the playbackRange , "set the start time of the playback frame" and the "set the end time of the playbackframe" in the interface of maya which do the time range of the Use camera path and not the start and end frame in the vrayCommon

Lataf

[t.petrov]

Okay, After some help from Vlado about how camera path works, I was able to understand what is your problem.

One way to work around this problem is to use a pre-render script set in the render settings -> vray -> vray common.
The script should look like this:

playbackOptions -min 13 -max 24 -ast 13  -aet 24;

Where 13 and 24 should be replaced with:
1. 1 and 110 for the first render
2. 90 and 200 for the second

The pre-render script can be overridden, so it should do the job.

Hope it helps.
Also can you tell us your V-ray and Maya versions?

/Teodor

[lataf]

okay I try that tomorrow and I une maya 2012 and vray 2.4
Thanks for the help guys !!!

Lataf

[t.petrov]

If you use a pre-release of 2.4 it is a good idea to switch to 2.3 or a night build, because the pre-release versions of 2.4 are known to be broken.