1. To speed up the Surface or Volume Scatter operation you can decrease the Display resolution of smooth objects before you apply the scatter tool. See Tip Here for tips on reducing the Display resolution of smooth objects. The generation of numerous scattered low resolution objects will be much faster than the generation of many high resolution objects.
2. Turn the Auto Update option OFF when changing numerous parameters in Tool Options palette while in result buffer mode. The scattering will only update when you click the Update button so there is no need to wait for an update after each parameter change.
3. Undo’s in the result buffer mode are saved for each parameter change so if you plan to make many changes turn the Auto Update option OFF as described in step 2.