I have managed to simulate 65K floating bodies in DualSPHysics. Given the GPU capability of DualSPHysics, I think it has a great potential of being a pure DEM simulator as well. I see that it's limited by the memory constraint of marker Mk at the moment. Can you please point me to the right place in the code to take out the marker tracking of the fluid particles and floating bodies, such that it can treat the current 'fluid' particles as solids? They will have to inherit the properties from the materials xml as well of course. Thanks.