Shadows for inserted content

A non-transitory computer-readable storage medium comprising instructions stored thereon that, when executed by at least one processor, are configured to cause a computing system to at least:

• determine a location within an image to insert content, the content including a skeletal animation model;
• identify a surface plane based on the image;
• generate a bounding box on the surface plane based on a plurality of skeletal joints from the skeletal animation model;
• determine a shadow center point location on the surface plane based on the plurality of joints;
• generate a shadow entity based on the bounding box and the shadow center point location;
• and
• render the shadow entity using pixel values determined at least in part based on the shadow center point location.

A system comprising:

• a camera assembly;
• at least one processor;
• and
• memory storing instructions that, when executed by the at least one processor, cause the system to:
• capture an image with the camera assembly;
• identify a surface plane based on the image;
• determine a location to insert content that includes a polygonal mesh defined in part by a skeleton that has a plurality of joints;
• generate a bounding box on the surface plane for the content based on the plurality of joints;
• determine a center of mass location of the content based on projecting the plurality of joints on the surface plane and averaging positions of the projected plurality of joints;
• generate a shadow polygon on the surface plane based on the bounding box and the center of mass location;
• render the shadow polygon using transparency values that are based on applying a radial falloff function to the center of mass location;
• and
• overlay the inserted content on the rendered shadow polygon.