Here’s a quick and somewhat un-edited video I just put together on frame blending time-lapse HDRI with After Effects.
Frame mixed issues with IBL
Probably the only thing I didn’t really touch on in this video is the effect of frame-mixed HDRI frames on IBL, which is in a word, not good 🙂 Because the frame mixing creates multiple suns, brightness varies in between every frame. So this is certainly only a solution for background usage. You may want to consider using a non frame mixed version for IBL running half speed, then the frame mixed version for the background.