Import Shapes from ORTHO 2D TOOLS menu in RC

Does any one ever used the import shapes option from ORTHO 2D TOOLS menu in RC?
Im trying to do some earth volume calculation from the orthomosaic but i have the shape in a KML file an i havent found the proper way to convert it to .JSON.

So far having just errors trying to import.

Any experience whit this option?

Thanks

Hi Maverikhp,
have you tried to export that JSON file directly from RealityCapture and then compare the file’s difference between exported one and yours?