From a translated interview
"As always, we aim for the highest graphics quality, and this naturally imposes limitations. We haven’t reached the point in time when we’ll be able to divulge details regarding resolutions, but in terms of framerate we’re targeting 30 FPS."
"We’re working to make destructibility an important part of the game. We don’t want to add something just for the sake of technology, therefore we’re analyzing the many situations in which players will be able to interact with objects in the game world. Currently, we’re using a system for destructibility and cloth simulation which is based on NVIDIA PhysX, more specifically using APEX. We’re doing everything we can to optimize in our own, although we are always in touch with NVIDIA to eventually reach the best possible performance.
There are many factors that determine which effects are executed on PC without performance hassles, and the GPU is of course the primary one."
http://www.worldsfactory.net/2013/12/21/the-witcher-3-targeting-30fps-with-physx-destruction
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