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
you will need to use a single frame GI method.
LC + QMC might be a good option
Or perhaps the new Irr map animation modes.
Jacks, could you elaborate on that a bit ?
I haven’t moved up to 1.5 final yet so, maybe that could also help.
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 
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
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.