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I'm running on 1 GPU at the moment, and it's making LW really sluggish. Adjusting settings/materials become really hard with a sluggish machine. And for the first setup phase I really don't need more then 20-50 samples.

Is there a way to set the maximum samples in the IPR? The kernel settings don't work for this, when set to 10 for example. The IPR still render unlimited samples.
And pressing pause every time is not really usefull.