VRay and slice modifier

[Infrared digital]

Hi

I'm doing an animation and want to use the slice modifier but have run into a problem with the lighting solutions.

One camera animates the slice going down the building then stops for a few seconds then the next camera moves off but when it does moves off there is a noticable change in the lighting.

I assume this is something to do with the pre-calculated IR and LC maps changing from camera to camera and with the added complexity of the slice modifier in there too.

Does anyone know how to solve this ?

Thanks

N

[jacksc02]

you will need to use a single frame GI method.
LC + QMC might be a good option

[dlparisi]

Or perhaps the new Irr map animation modes.

[Infrared digital]

Jacks, could you elaborate on that a bit ?

I haven't moved up to 1.5 final yet so, maybe that could also help.

[Clifton Santiago]

QMC+QMC

[palibebeh]

Hello and greetings to all!!

Since this is my first post on theese forums, I'd like to introduce myself.

My name is Maciej, I'm an architect/freelance 3d graphic/animator from Poland. In my daily work I use 3dsmax + vray, ArchiCad, AutoCad, PS, Fusion, Edius, Corel and so on.

I've been reading this here great forums for a while now, and have learned many many useful things about v-ray and 3d in general. I hope to share my knowledge with You guys - if there's anything that You people don't know about 3d/max/vray :P


and now back on topic:

It just happens that I recently had to cope with animated slice+ GI.
And I found that the best way to do this - with flicker-free and clean GI - is to precalculate IRR (or IRR+LC) with either slice turned OFF (if there are not many objects) or all slice keyframes moved away from your animation's range - to calculate GI with fully visible objects.
And since slice is possibly not considered as any change in geometry - the GI will be as smooth as on non-sliced object, and much faster than QMC+QMC.

cheers

[joconnell]

True it won't flicker but if you reveal a part of your scene that the irmap didn't see then you'll get darker patches when the slice animates. It might look okay but it'll be technically wrong - again it's down to personal preference and if the flaw is really bad or not - if it looks okay to you then fine!

Personally I'd go for qmc on primary and either qmc or light cache for secondary - It'll take longer to render but it'll have the least chance of errors afterwards.