Bug/Wish: Cancel Lightmap.

[dbuchhofer]

When i cancel a lightmap with a hung thread or simply because its going abnormally slow, it will continue its calculation step before it cancels.

in time it will finish 1 thread, and the cpu usage will drop to 50%, and eventually the other cpu will finish and it will release my copy of max.

A more timely cancel from a slow lightcache would be very very helpful in more complex scenes.

[Dynedain]

I think this is related to the same cancel problems that Vlado discussed a loooooong time ago. Basically, he has coded vray to search to see if the cancel button has been hit at the end of certain steps/iterations - like you are experiencing with light cache. If I remember correctly, to modify the code so that it checks the cancel button more frequently (during the steps and some given increment) would mean a significant increase in the total rendertime because of the repeated lookups involved.