Animation with moving objects - again !!

[stevesideas]

Hi there. I know this has been discussed a number of times. People still seem to get flickering with the methods featured online so I just wanted to find out about how to render this type of animation for a specific project.

I have an interior scene where cupboards open and you see inside. Obviously they are dark and then light will enter them. I have seats moving also. None of these objects move a great deal.

So I need to know the best method to accomplish a flicker free animation.

Am I right in thinking that I pre-calc the irrmap every nth (5th) frame with "use camera path" option on. Should I use lightcache for secondary at this stage ?

For the final render, I load the Irrmap from file and select single frame on lightcache.

If I want to speed up my renders should I have "use lightcache for glossy rays" on for the final render ?

[LarsSonparsson]

For animation with moving objects you should save irmap for every frame using animation (prepass) mode.
Then when rendering the final animation, switch it to animation (rendering) mode.

I don't think that every 5th frame is enough for moving objects.

[stevesideas]

Ok, so would I use lightcache for secondary for pre-calc and rendering ?

[LarsSonparsson]

For pre-calc only. When rendering, you can leave it empty.

But if you are using "use lc for glossy reflections", you have to leave it on for rendering too.

[stevesideas]

OK, I'll give that a go. Thanks for your help.

[stevesideas]

Some more questions if you dont mind.

For pre-calcing the irrmap would I need to have use camera path on both irrmap and lightcache ?

[LarsSonparsson]

Hmm... I usually don't use "camera path" at all.
Maybe I'm doing things too old fashion.

[Guest]

Tick use camera path for both. An extract from my tutorial http://www.mintviz.com/blog/flicker-...on-using-vray/

"You now have two options depending on your workflow, if you have rendered your animation with use light cache for glossy rays ticked, you will need to leave your light cache as the secondary GI engine. Keep it in single frame mode and have use camera path ticked. If you have rendered without use light cache for glossy rays, disable the secondary GI engine leaving only the irradiance map as the primary GI engine. You can do this because the secondary GI data has been stored in the primary GI engine via the irradiance map prepass.

[LarsSonparsson]

Thanks. Have to try that next time.

Does it increase rendering time?

[stevesideas]

James, I'll have to check out your tutorial..looks promising!

[priad]

first brufe force+second lightcache= no flickering.

[stevesideas]

...and no precalc either...is that correct ?

[priad]

no precalc for brute force but I can check @ the moment for the LC. sorry I'm on a tinny dead line tonight all computers are booked.

[priad]

"I can't" sorry

[priad]

this vid was computed with this method, and no problem at all, I had all settuped in this vid.
just make a test with LC in different modes on a small scene to check it.