Exported assets are free to use commercially and modify.

ShaderLib

equirect

Panoramic environment

equirect
Preview requires WebGL2. You can still download the demo.
Drag to orbit · Middle-drag to pan · Scroll to zoomOne finger to orbit · Two fingers to pan or zoom

Wraps one panoramic picture around the scene, like turning a world map into a globe. Turn to look in different directions.

Official source