Thanks guys. Badger, I'll share this stuff when it's done, of course.
I couldn't stop to improve this weird dermatological shader and wanted to add some pimples creating some populations of squashed spheres. Even though I had moved the pimple object's pivot to the center of the object, some of them seem to be floating above the head's surface.
If the populations would be anchored to a terrain, I'd use a smaller patch size of the compute terrain, but since they are populated onto the head, I can't seem to do a similar thing. Any ideas?