Render Toolbox is a Blender add-on from Split Studios that gathers several rendering tasks into one interface. You can add and control HDRIs with a few clicks, adjusting rotation, strength, and ground level, and set background orientation using X and Y rotation options. Camera bookmarks store full camera transforms and settings without needing keyframes, and you can paint lighting directly onto a model to interactively control highlights and draw attention to key areas.
For final polish, the add-on applies camera effects including glare, lens distortion, chromatic aberration, film grain, and vignette. A light manager lets you select lights from the viewport or a list, rename them, and edit their attributes in one place, while a single click inserts keyframes for all current camera settings. Adding effects enables them in the viewport for immediate preview, and camera switching updates across multiple viewports.
Render Toolbox supports Blender 4.2 through 5.0 and works with Cycles and Eevee. Version 1.3 added Blender 5 support and fixed a black-screen issue in 4.5. It's distributed under the GPL license, and a demo video is available.