This collection includes over 40 HDRI environments created specifically for analyzing surface quality and reflections on 3D models. Available in both 2K and 4K resolutions, the pack features a variety of lighting setups designed to highlight surface irregularities and help judge reflections. The included studio light rooms provide specific arrangements like light tunnels, concentric circles, side lighting, overhead panels, and grid lights. Additionally, the pack contains stylized gradient environments including silver gradients, various time-of-day sky gradients, and cross-beam skies. While originally designed for Gravity Sketch workflows, these standard HDRI formats can be used in Blender to evaluate modeling topology and surface continuity.