This DLC changes the SpaceEngine license to allow for personal commercial use, and unlocks some "professional" features helpful for capturing video footage and creating space assets for your own projects: Camera path editor Ability to save video and screenshots with transparency Unlimited resolution for exporting skyboxes, including with HDR DDS cubemap format Unlimited resolution for exporting planet textures Unlimited rendering resolution in the fisheye/dome and equirectangular projection modes Note: unlimited resolution means that SpaceEngine will not restrict you from using any resolution you want, but there are practical limits due to limitations in your graphics hardware. If you have a very recent high-end card, you will be able to use much higher resolutions (e.g. 32768x32768) than you would be able to achieve with older or low-end hardware (e.g. 8192x8192).