HDRi Maker Studio is an add-on for generating and customizing environment lighting and backgrounds in Blender. It features a dome projection system that maps HDR and EXR images onto 3D shapes including hemispheres, cubes, and cylinders. The tool projects environments onto the ground plane, allowing 3D models to cast shadows and interact with the background terrain. A built-in Wrap and Hook system enables users to deform the ground and adjust the perimeter of the dome to match the geometries present in the HDR image. The add-on includes a Light Studio tool for generating solid color backdrops with smoothed lighting setups. Additional features include animatable volumetric fog, an EEVEE-compatible shadow catcher with reflection support, viewport blur effects, and a utility for baking new HDR images directly from a 3D scene. The package includes over 480 HDR and EXR backgrounds.