I own a dual-core i7 surface book. While rendering a 120 frame scene, I set my noise parameter to 10% and did several test-renders. I found that each frame came in under 1 hour. The scene has no moving objects, just a very slow rolling camera (just for movement effect). So from that, I determined that the entire render would take approximately 120 hours.
Because it's so processor intensive, I would refrain from using the computer for other things, to try to maintain render times around the hour mark. That number has been pretty consistent, even though I've had to start and stop my rendering as I moved my computer or needed to use it for other things.
However, something strange happened last night. I started the renderer, like I always do, and the renderer just started pumping out each frame with blazing speed. It was rendering every frame, at the same exact settings, at 20 minutes per frame. In other words, it was rendering 3x faster than any other time. I watched this go on for about 8 hours and had to stop the render to take my Surface Book to work.
it is now back to the 1 hour render frame, and nothing I do will give me those screaming render speeds again. I have looked at the faster render frames and they are the exact same as the frames that took 3x longer.
Can anyone account for this phenomenon? Is there some setting in Corona that tells it to optimize both cores, or optimize memory, or that would in any way account for this anomaly?
I'd love any suggestions, because I'd do anything to get those render speeds back.
