One great thing about the native 3D environment in DaVinci Resolve and Fusion is the possibility to project footage into 3D.
Use a 360 image or a cyclorama as background for your 3D scene, make a spherical segment for a background sky, or get reallistic parallax from projectors. You have three options to get your images into 3D:
Image Plane 3D: use this tool to get a card of your photo or video into 3D. The result is the same as with the Shape3D Plane. Yet, Image Plane adjusts the dimensions to fit the aspect ratio of the 2D footage.
Texture/Material input: Attach to directly to any 3D object (e.g., Shape 3D) or material. This way your image works as a texture. Fusion wraps the image around the object, as per its geometry. This is the default way for any textures coming from 3D applications. It is also the way to attach generic textures for materials. For footage it does not always make sense. For example, if you attach your image to a cylinder it gets wrapped all around the cylinder. Great if you are working with a cyclorama.
Camera projection: This way your 3d camera kind of reverses its function. Instead of capturing the scene, it throws an image onto the scene. Imagine a spotlight that is casting an image instead of light. You can use it to project regular footage onto different shapes and create parallax.
See all three methods in action in this tutorial.