From your website:
OPTIMIZATION
We’ve made huge optimizations to the rendering of the map that should have a huge impact for most lower-midrange and upwards systems. We are now easily able to get a solid framerate even on 4K, or on furthest zoom. The difference in performance is honestly surprising, and extremely satisfying.
For full disclosure, however, we’ve discovered that a few of the absolutely lowest end systems capable of running our game are still adversely affected. This is because the solution for such large FPS optimization comes at the expense of GPU memory usage for the caching textures used. Cards with extremely low dedicated GPU memory may run into problems.
We’re investigating and trying to optimize this further to make sure as many systems as possible can benefit, and worst case scenario these optimizations will be disabled on systems where they would do more harm than good.
However, it’s still entirely possible that we’ll be able to resolve this completely and provide a large boost to even the most potato systems. More likely, we’ll provide some kind of automatic detection to provide as large a portion of the optimizations as possible for a GPU’s available memory. This will be our next task post visual-bug clear out.
Generally we estimate that a huge majority of our playerbase will benefit greatly from the optimizations. Since most of the optimization frustrations we hear come from players who feel their machine should be able to run PZ at a solid framerate, we feel this work will ease the vast majority of performance sadness we see in the community."