Pectabyte wrote:Its fine if I place a day light source in there. Its literally only in low light situation. I have no idea what an ORBX scene is, but this file is several gigs worth of assets, if that makes a difference.
OK, so it clearly
is the lights, then. Yes, low light is inherently noisy, (and even more of an issue with a high number of light sources for CGI). That's an unavoidable fact if you are ray trace rendering, shooting a film camera, or a shooting a CCD camera. Fewer photons means more noise.
ORBX is the native file format that Octane uses. It's essentially what the render engine is actually rendering, and what you can examine and edit in the OctaneRender stand alone application. It's also a good format for sharing while troubleshooting, since it's not tied to any given 3D host package.
You have many, many lights in your scene, but you really should not need 15,000+ samples to get a good looking image. Some light sources are more important than others, and you need to figure out how to use them optimally. It is not a trivial problem. Normally, the AI Light does a pretty good job of this, but not always. As I mentioned previously, I suggest you isolate different logical groups of light sources and see which ones contribute the most to overall scene illumination, and which contribute minimally to inter-object illumination. Then use the Sampling Rate for each source to weight them accordingly. The Sampling Rate is a relatively weighted value, not an absolute value. It doesn't matter if you use 1 and 0.1 or 100 and 10. They have the same relative weight to each other.
You should be able to get a much cleaner image, much faster than what you've got now. In addition to optimizing your lights, definitely read up on Adaptive Sampling, Denoising, AI Lighting, and the GI Clamp value. Since you are having crashes, you may also be running into a low memory issue, and may want to look into Out of Core RAM use.
