- For RailClone, unfortunately we cannot control the way that 3DS Max handles the spline notifications (or any other reference used by RC).
Max just notifies to the plugin when spline changes (and that happens for any action), and we must rebuild RC to keep it updated.
There are some tips which may help you. But really there is not a simple solution, specially for heavy objects:
a) Use 'Quick-Mesh' or 'Point-Cloud' for Display mode, not 'Mesh' (which is the slowest mode).
b) While editing, simplify the model. For example, for parametric buildings, reduce the number of floors. Once adjusted, set it to the final value.
c) Remember you can rebuild objects from the Lister: select objects in the first column, and use the toolbar icon to rebuild.
d) For objects which are not being edited, use Display->Proxy Cache
mode. When enabled, RC object is locked, geometry and instances are stored internally, and it's not necessary to rebuild the object anymore, until you need to make some change.
This state is also saved in the scene file. You can enable it from the Display rollout, or from the RailClone Lister
- Regarding Forest, we are aware of the performance issue with Point-Cloud mode. Although it worked well with older 3DS Max versions, its performance is not the best with recent changes in Nitrous.
We have some ideas to improve it, but that also will change significatively the way that Point-Cloud is shown. We have to test it and decide.
Meanwhile, we suggest to use Display->'Proxy'. That's the most efficient mode.