Sure, sorry for the suspense. As you note, the FleX API offers many things that are not yet exposed through UE4’s blueprints, or through any other mechanism. In time we will be adding support for particle state readback, etc, but they aren’t the top priority at point. Surface fluid rendering is still under way. FleX will never support the full range of gameplay hooks that rigid bodies do, such as contact callbacks, custom constraints, etc., but it may be possible to expose constraint forces in some way. I’ll pass the request along to the and see what they say. Every data synch back to the CPU is costly, so we have to be careful that new features will not degrade performance beyond usefulness.
3D volumetric objects are possible, I suppose we just haven’t exposed that at the authoring level yet. A destruction based on FleX sounds like an interesting idea to me, but our experience with rigid body destruction indicates that it will be a lot of work.
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