RenderMaskPainter

If you want to rerender only a part of your image you can make use of the region rendering.

But you can only render one region at a time and these have to be rectangle, loosing a lot of time in some circumstances.
Or you can take your latest rendering into Photoshop, paint a black and white mask on top of it and load that into Vray’s render mask slot, which is cumbersome.

The RenderMaskPainter eliminates this problem by letting you paint a mask directly in the viewport and feeding it into Vray’s mask slot automatically.

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With a few steps its possible to mask out several areas in different shapes.

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There is also the possibility to change the brush size…

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… or to invert the display.

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The rendered image from Vray, using the exported mask.