How to improve the 3d textured mesh

When I took pictures for my 3d model.And I am interested in an area.So I get close to the area and took more pictures.
I process the pictures of the area and got part of the model.And the 3d textured mesh is clear.But when I add these pictures to other pictures of this object to get a complete model, the area I’m interested be vague.

Hi Hu,

Do you mean that you combined images from two different projects? If so, I would recommend this article about merging: