Hue Change Mid Shot?

[cloudlung]

Hi Guys, Im new to terragen and running in to a few issues and was wondering if someone could point me in the right direction please?

I have attached a link to a clip to help explain the problem.
https://drive.google.com/file/d/0Bwreq_v4kMqRa3RFWHB1aXJqalU/view?usp=sharing

Half way through the shot you will notice quiet a big hue/light shift as the sky pops into shot. Is there away to make that blend and not pop on in one frame?
I imagine it has to do with the sky being visible and contributing to the GI maybe?

I have cached GI and and reading the GI every 5 frames.

Any other tips?

[Oshyan]

Interesting. Are you using GI Cache frame blending? If so, how many frames blended?

- Oshyan