Since ZBrush is a widely used 3D program, it may come as a surprise to many that it barely uses the GPU, relying almost exclusively on the CPU to render million

Since ZBrush is a widely used 3D program, it may come as a surprise to many that it barely uses the GPU, relying almost exclusively on the CPU to render millions-of-polygon models at interactive speeds. ( https://pixologic.com/zbrush/system/ https://pixologic.com/zbrush/system/ ) So there are big performance benefits to tuning ZBrush to take advantage of a particular processor's features and avoid its weaknesses. I'm also curious what the exact issue was, but given the scale of improvement, I wouldn't be surprised if it is some sort of cache contention between threads/processors. A cache miss in the inner loop of an algorithm can be catastrophic, and apparently Ryzen has pretty different cache behavior versus other CPUs: https://www.reddit.com/r/Amd/comments/5x7oaq/ryzens_memory_latency_problem_a_discussion_of/ https://www.reddit.com/r/Amd/comments/5x7oaq/ryzens_memory_l...