IR Subsampling question: slow when with animated camera. Why?

Corona Corona for 3ds Max General
1

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?

2

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.

3

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.
Test_IR.max (240 KB)

5

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