You must have a 3d program like Maya, 3dsmax or blender to model with. A mesh is a model that has verticies that define a shape in 3d space. Photoshop cannot generate these.
On the other hand if 2d is what you want then go old school and apply the Photoshop texture to a plane. If you use the alpha channel to black out the edges of the texture you won’t see the plane, just the texture.