François Gastaldo presents two OSL shaders that allow you to embed your models in an HDR scene.
Those two OSL shaders are a fast and easy solution to put 3D Objects in HDR Environment, without compositing.
QUIP is for Panoramic Camera. Use it with a targeted (tracked to) camera.
QUIPCam is for Moving Camera. It's a kind of Spherical Camera Mapping to have a very fast 3D integration result. It's a first step to more advanced 3D integration or FX.
Just create a ground, plane or grid, and apply this shader to it. Then, create objects to mimic the real scene.
This video is showing the workflow and some animations made with QUIP Shaders: