The units of physics in KSP are parts, i.e. they are considered to be rigid, indivisible bodies. The joints between them are flexible; they allow a craft to flex and break. This is a perfectly acceptable situation. However, as the number of parts increases, the calculations become unmanagable. The performance of Ubiozur's welding mod (http://kerbalspaceprogram.com/ubioweldingltd/), demonstrates that it is possible to simplify the calculations, while retaining gameplay (mostly). Is it not possible to dynamically 'weld' parts together or treat them as separate bodies, depending on the situation? Or even better, to treat the whole spacecraft as a single (wobbly) body, until a breakpoint becomes probable somewhere. It would be nice to be able to build mighty stuff in the mighty environment of KSP, with a less mighty PC. Of course, the introduction of larger parts in 0.23.5 will help with that, but large space stations or detailed motherships will remain a source of major lag. Any thoughts or news on this (old) issue?
