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Chaos Corona for 3ds Max => [Max] General Discussion => Topic started by: cecofuli on 2017-07-13, 15:10:41

Title: IR Subsampling question: slow when with animated camera. Why?
Post by: cecofuli on 2017-07-13, 15:10:41

Hello,

this is the situation:

1:  simple scene with plane and scattered trees;
2:  Ir Sub-sampling as default;
3:  PT+PT

(*) If I rotate the viewport manually, I have FPS = 10.
(*) If I have an animated camera (for example, with Path constraint controller) and I scroll the timeline manually, the FPS = 2-3

So, why?

Title: Re: IR Subsampling question: slow when with animated camera. Why?
Post by: maru on 2017-07-13, 15:56:44

How are the trees made? Is it Corona Scatter or some plugin? Does the same happen with some more simple scene, like a plane with teapot?
It might mean that some geometry is reloaded per frame.

Title: Re: IR Subsampling question: slow when with animated camera. Why?
Post by: cecofuli on 2017-07-13, 16:04:17

Hi Maru, they are a simple AEC 3ds max trees with CoronaMtl.
But, it happens in every scene, also with a simple test room with a window, pr a plane with teapot.
Look at the scene in attachment and see with your eyes.

Title: Re: IR Subsampling question: slow when with animated camera. Why?
Post by: Ludvik Koutny on 2017-07-13, 16:31:42

Because moving timeline causes Corona to re-parse the entire scene from scratch, and currently, there is no way to avoid it.

I proposed a "lock" feature for camera animation previews, which when enabled, would freeze updates of everything in IR except camera position. It would work for camera animation previews, but not for animation of anything else in IR.

Title: Re: IR Subsampling question: slow when with animated camera. Why?
Post by: cecofuli on 2017-07-13, 16:43:32

ahh, ok... Sad to know that it isn't possible to avoid.
But, your idea it very good. =)