This is a simple Setup to project Hdri Images in Cinema 4D and Octane. You can place objects precisely in to the Hdri or move objects like a car over a path. You can also make holes, paddles and hills with the projected Hdri.
Watch a Video:
Setup for the C4D Octane Hdri Projection:
Adjust Dome Geo, positioning the HDRI precisely and some emission and color correction settings.