level of sea bottom instead of water level

I have got some troubeshooting with making of project , connected with seaside :
part of the waterlevel have different alitude , it uses resolution level of sea ​​bottom to generate waterlevel, and some part of flat surface : video of project

Hi and thanks for your interest in Pix4D solutions.
Thanks also for sharing the video of the project over the capsized vessel and shallow reef area. The scene seems to have reconstructed fairly well given the presence of dynamic (wavy) water (a notoriously difficult surface type to capture due to transparent and reflective nature).We offer a short support article for best results over water. I hope this is helpful.
Regards,
Aaron Woods