Abstract: The invention relates to a method for exchanging a 3D view between a first and a second user having both a piece of software for creating 3D views. A view is created by the first user. This view comprises an encrypted object, the first user being licensed for the encrypted object. This view is stored in a file by the first user. The encrypted object is encrypted and the result of this encryption is stored as encrypted data in the file. According to the invention, non-encrypted data defining the encrypted object is stored in the file in parallel to the encrypted data relating to the encrypted object. This non-encrypted data can be read by the second user, so that the second user can see the encrypted object if he has acquired a license for this object, or a basic representation of the encrypted object if he has not acquired a license.

Abstract: A process for creating three-dimensional or relief views with the help of software running on a computer system for adjusting brightness of a scene comprising a plurality of pixels includes: determining a representative brightness of at least one predetermined area of the scene based on brightness of each pixel of the at least one predetermined area; comparing the average brightness to a reference value; and correcting the brightness of at least a portion of the scene in accordance with a result of the comparison.