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In Photoshop, while using the poly selection lasso tool, you can hit delete to undo a point. Is there a shortcut for this in TVP using the poly lasso tool?

no

I never knew that about the Poly selection tool in Photoshop (thanks , now I know !)

That would be useful in TVPaint , too.

The only workaround for now would be to use the Bezier or B-Spline Selection tools which have the menu option for Deleting a point when you right-click on the point.


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or simply paint the selection you need with any drawing tool and use the magic want tool on that to transform the area to a selection...

but you may not even need the selection at all.
if you use the layer with the painted selection as a stencil