The double CD 'hdri vol.3' includes 24 interior lighting textures. They are 360° full sphere HDRIs. All HDRIs are available in four different mappings (Fisheye/Lightprobe, P-Sphere, vertical cube and horizontal cube); and every format in three different resolutions. Additional there are example renderings and descriptions on the CD. All files can be used immediately from the CD - you have not to copy and unpack them.