The skyboxes are perfectly seamless. They wrap an infinite background around the viewer and resemble a blueprint or schematic, a pseudo technical drawing board if you want.
This is perfect, if you want to present assets/units in your game or application, such as on a unit customization screen, or a tech screen, etc.
The textures are provided in .psd format for 3 reasons:
Should you need a custom color variation, that is beyond what you can do with the provided .psd files, please also get in touch.