An absolutely awesome tutorial Bagginsbill!

My question is, when would you have to recalculate a shadow map (ie; can't reuse map from previous render) other than animating? From what I'm understanding is that if I alter the strength, I don't have to recalculate. If I move the position of the camera, no recalc. If I move the light, recalc.
I'm just trying to make sure my head is wrapped around this properly.

Thanks again for your tutorial and time that you've spent on this.
Regards

Comitted to excellence through art.