Scene rebuild between paint strokes

[uuderzo]

When painting over an heightfield I noticed that after each stroke the scene gets a polygonal rebuild, which makes the entire process very slow.

Is there a way to lock the computed polygon set until I decide to release it again?
In fact while painting the point of view is static and I don't get why Terragen needs to recompute everything at each stroke.

Thanks!

[WAS]

Pause the preview when it's finished. I pause when you need to see result applied as a mask/colour/whatever outside the shaded preview you paint.

[uuderzo]

D'oh! How i noticed the pause button.
Works as expected thank you!