To clear up any ambiguities I've listed useage rights definitions as applies to this site.

All rights reserved: You may not download or use this work or file. It is present on the website for display purposes only. If you wish to gain rights to the file, you must make an effort to contact the uploader and ask for specific permission.

Non-commercial use only: The displayed work or file cannot be used or modified and then used as a part of any venture or production that has the purpose of making a profit. It is likely the uploader intended the work or file to be used for educational or hobby-related uses only.

Limited use with credits: You may use this work or file in any way as long as you credit the original author of the work or file. This means that if the work is used in a film or movie, it should be credited along with the other accredited parties. If it is used in a final work of art, the author of the work or file needs to be credited in a way so that any person viewing the artwork would also naturally see the credits. In all other cases, use common sense and your best efforts to credit the author. If you do not know the actual name of the author, you may use their ShareCG username.

Unrestricted use: You may use the work or file for any purpose. You are not required to credit the author, although doing so would still likely be appreciated.