Hi and hello,
I'm relatively new to Terragen, but already in love with it. But recently I stumbled upon some strange behaviour I'd like to ask about. I'm using a HP Z820 with dual 2690s, Quadro6000 and 128GB RAM (the same as user Oshyan mentioned in this thread) but have some issues with render speed and cpu/core usage.
In short, with any given scene, the machine renders faster, if I lower the core detection override in the preferences. So if I'm going with all 32 cores of the machine, a simple scene would render in HD at about 12 minutes (process in task manager at 100%). If I lower the cores to 8 (process in task manager at 25%) the same scene strangely renders within 3 - 4 minutes (seems to be the sweet spot). Also, the terrain preview (not RTP) is significantly faster with lower core usage.
I have no real explanation for this other than that threading in Terragen may be confused with 32 cores. Since user Oshyan mentioned the same workstation, I'd be very much interested if this could be an issue with my Z820 or something else.
Oh, I forgot: using Terragen4, Win7 Pro (fresh install)