V-ray animation rendering

[Maven]

Vray LOVES polygons, it deals with them faster then maps and opacity's and such...so I would go with full polygonal trees and making vray proxies out of them before the render.

as for the animation you need to save a irr. map for every nth frame (you decide) and reuse that irr. map at render time.

if you have more Q's you should go to the vray forums on the Chaos Forums.

[syedamin7]

if your animating something in your scene then dont use an irr map. use it only if its a camera walkthrough.

[chriserskine]

If I'm rendering an animation with vray and it has rpc or other 2d billboards then I'll render a vray pass with everything but the 2d planes and render those with scanline and comp them together.

vray render times die when you add heaps of opacity maps

[CaptainObvious]

vray render times die when you add heaps of opacity maps
That's strange. Any idea why this is so?

[chriserskine]

on the scene i'm working of at the moment (arch viz stuff) I was getting 10min+ on a single vray pass. splitting the scene up with 2d trees and shrubs on a seperate pass I'm getting about 3min for vray and about 1min for scanline

[cpnichols]

Don't use opacity maps. Vray hates them. It gets its power form raytracing so it can actually deal with refraction better than opacity. There are several ways to deal with that. The easier way is to put the opacity texture in the refraction instead and have an IOR of 1.0. You may need to turn up the refraction depth to something like 20... But it will cream through the render that way.

[jophus14]

Thanks Christopher, I always used maps in the opacity slot for my materials instead of placing them in the refraction slot. I'll have to try this out and see the difference in render time.

I just tried it with a small tree map and rendering it with the map in the opacity slot and it rendered in 30 seconds while rendering with the map in the refraction slot rendered at 27 seconds. Any time that is saved helps.

[MikeBracken]

For distant trees I dont use any maps, just color variations. Using vray proxies, I have used 10,000 + trees in the distance. For close up trees I used the xfrog trees without the leaves.
I then modeled a few single face leaves and used scatter to attatch them to the trees branch tips. As mentioned in this thread, without opacity Vray can crunch through some
amazing poly counts.

Regards,
Mike

[chriserskine]

mike,
do you just use 3d trees as vray proxy's in the background?

[MikeBracken]

Yep. Xfrog mostly. For the background trees I just dont use the maps. They are detailed enough that they still look real good. And with Vray I have yet to reach the limits of proxies.
Of course when we switch over to 64 bit we really wont need to use the proxies much anymore.

Regards,
Mike

[iffi]

thanks for ur nice replies , these are very useful

Mike can u share the image or animation in which u use 10,000 + proxies

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