How to select points which are below (under) polygon in 3D?

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I have two layers. Points are (point z) shape and polygon is (polygon z) shape.I would like to select only point which are under polygon. Look at picture, On the first one you can't see points which are under polygon, on a second one I turned off polygon layer(all points are visible).

Is it possible to convert polygon to some kind of volume(object) and then use select by location (contain the source layer feature) in 3D?Any other ideas?

Thank you

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