How do I avoid holes and fix them

Hi superstars,

Loving the RC experience to date but I’d like to learn how to improve my models from drone imagery.

I’m pretty pleased with this effor but there is a lot of room for improvement - in particular holes in the mesh…how do I avoid getting and, in this case, how do I fix them.

I am guessing that photogrammetry is going to struggle with thin elements, such as the sails and other struts…but is there something I can or should be doing to improve this?

Many thanks in advance.

Paul