GiD forum

In any .gid file that I create, there are always the following kinds of files:

MAT File: Defines Material properties
PRB File
CND File: Loading/boundary conditions
BAS file: code that produces .DAT file and uses .CND and .MAT file (possibly others)
RDR File:??
VV File:??
LIN File:??
MSH File: binary file with mesh information
GEO file: binary file with geometric information

What do the RDR, VV and LIN files do? I tried creating a directory with only these files but the program does not recognize them as legitimate .GID files. Furthermore the RDR and LIN files look like they are binary (when opened with notepad editor) while the VV File has some legible information. Could anyone please provide some more information as to the role of these files? Thanks!

PRB File: defines problemtype general data (simulationtion data that is not attached to any geometry/mesh entity)
RDR File: auxiliary file that store the render mesh of the geometrical surfaces. Could be deleted and will be re-created
VV File: auxiliary view file, that store the current viewpoint, render mode, etc.
LIN File: it store the values of the conditions applied to geometric (the .cnd only store the definition of the conditions, not its values and entities applied). If the lin file is deleted the applied conditions will be lost, but the geometry an mesh continue valid.
PRJ: file that maybe in the future will store the whole project. Now is storing the definition of groups, and the current layer to use,..
TREE: auxiliary file that store the current state of the layers and groups tree (e.g. the expanded/closed branches)
TXT: optional file that can store some descriptive text (written in the notepad-like simple text editor of the macros toolbar icon)
PNG: auxiliary snapshot of the model, shown in the file browser to preview the model.