The Spherical projection mostly is used for Environment textures and IESAn IES light is the lighting information representing the real-world lighting values for specific light fixtures. For more information, visit http://www.ies.org/lighting/. light distributions. It performs latitude-longitude mapping for the U and V coordinates. When used with Procedural textures, the W coordinate is the distance from the origin

Figure 1: Spherical Projection applied to RGB Image TexturesTextures are used to add details to a surface. Textures can be procedural or imported raster files., a Saw Wave Texture and a Turbulence Texture.

Figure 2: Spherical projection applied to a box, cylinder, and sphere.

Figure 3: Spherical projection for background and to light the scene.
Refer to Chapter Lighting → Daylight Environment → HDR & Sun for more details.