High-Quality Cloth Simulation With Nvidia Physx Flex (Also Softimage Ice)
This is the first post demonstrating what NVIDIA PhysX FleX is capable of when it comes to high-quality simulations. I'm planning to show how it can be used for all kinds of simulations with the upcoming blog posts. Also a cool demonstration video below.
What is FleX?
FleX is a particle based simulation framework developed by NVIDIA for real-time visual effects. The idea is the following: instead of a having a bunch of solvers for each type of a body (rigid, soft, fluid, cloth e.t.c.) why not create a unified solver based on the concept of using particles (or “molecules” if you prefer) to represent the bodies? Then, make this solver work on modern GPUs to deliver unprecedented simulation speed and you can actually use the result for real-time simulations in games or interactive presentations.
Now, we all know what “real-time performance” means when it comes to the “offline” CGI... ;)
GPU CUDA render farm speed/cost comparison chart (june 2016)
Out of curiosity decided to quickly compare the cost and rendering performance of several CUDA-capable GPUs.
Scores taken from the official OctaneBench results database. Prices - from local online merchants in my area (TAX, VAT included) so your mileage may vary. I used my GTX 970 results as reference. The fact that it's one of the most popular enthusiast-grade GPUs on the market also helps.
I didn't account for the power consumption because electricity rates vary a lot from area to area so if you're planning to run your render farm 24/7 (which is not recommended) you can look into it yourself.
(Used) NVIDIA GTX 780 Ti is a clear winner here. So if you're thinking about building a render farm to use with Octane or Redshift, check it out, it's a bargain.
As soon as GTX 1080 CUDA-compute/rendering results become available I will add them to the chart. Don't expect a miracle though. Preliminary benchmark results from various forums including Redshift and Lexmark show that GTX 1080 is pretty much just a tad faster than 980 Ti and Titan, and in some heavy scenes it can actually be slower than the two! Hope it's just a driver problem and we'll see at least 20-25% improvement over the previous flagship models as promised by NVIDIA.
Otherwise it will be a grave disappointment.