Pix4D offers software for professional drone-based mapping.
Sketchfab can support 3D models exported from Pix4D. The most reliable way to export a Pix4D model for your Sketchfab account is a textured mesh output in FBX or OBJ + MTL format, with 4k textures.
For more details and instructions on the Pix4D export process, visit the Pix4D Help Center guide.