Ok, so I've posted about this before and taken part in some discussions about it, but never quite get an anwer. So I'm rendering scenes for a comic book. Rendering in Iray, default settings with a 1500x1200 images size. Scene consists of two G3's, their clothing and a simple room. Usually using an HDRI lighting, sometimes an emissive plane. I render my first comic book panel. Tongiht when I started it took 14 minutes. So I'm off and working. Then at about the fifth render things start slowing. By render six, the same scene is taking over 40 minutes. Sometimes saving and shutting down Daz will fix this, but when I do, I don't get back to 14 mintues. Its the exact same scene, lights, figures, cameras, everyting. I've installed GPU-Z as suggested to monitor GPU memory and temps. Memeory seems to be fine. Maybe "memory used" will be at 300MB or so inbetween renders and temp might get up to 60 degrees C, but not over. I'm using the latest install of DAZ, Windows 10, a NVIDIA 1060 with 3GB.
Any one know why this keeps happening? Its driving me nuts!