An nif file extension is related to the GameBryo video gaming engine. An nif file stores 3D model.
There is one other file type using
the NIF file extension!
.nif - NetShift interface file format
Detailed description
Software that open nif file
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What is nif file? How to open nif files?
The nif file extension is associated with GameBryo game engine developed by Emergent Game Technologies. This engine was used by many games, including Fallout 3.
The nif file is a 3D model used by the engine.
The default software associated to open nif file:

GameBryo LightSpeed 
Company or developer:
Emergent Game Technologies
Gamebryo LightSpeed is a fully featured game development system that ensures a cohesive game creation experience.
Help how to open:
Use GameBryo LightSpeed to work with *.nif files.
How to convert:
As far as we know, this .nif file type can't be converted to any other file format. This is usually the case of system, configuration, temporary, or data files containing data exclusive to only one software and used for its own purposes. Also some proprietary or closed file formats cannot be converted to more common file types in order to protect the intellectual property of the developer, which is for example the case of some DRM-protected multimedia files.
File identification strings:
HEX code: 47 61 6D 65 62 72 79 6F 20 46 69 6C 65 20 46 6F 72
ASCII code: Gamebryo File Format, Version
List of software applications associated to the .nif file extension
Recommended software programs are sorted by OS platform (Windows, macOS, Linux, iOS, Android etc.)
and possible program actions that can be done with the file: like open nif file, edit nif file, convert nif file, view nif file, play nif file etc. (if exist software for corresponding action in File-Extensions.org's database).
Hint:
Click on the tab below to simply browse between the application actions, to quickly get a list of recommended software, which is able to perform the specified software action, such as opening, editing or converting nif files.
Software that open nif file - GameBryo model
Programs supporting the exension nif on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for open nif file action.
nif file editor and apps that can edit nif file - GameBryo model
Programs supporting the exension nif on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about listed programs for edit nif file action.
Programs that can create nif file - GameBryo model
Programs supporting the exension nif on the main platforms Windows, Mac, Linux or mobile. Click on the link to get more information about GameBryo LightSpeed for create nif file action.
Unspecified and all other actions for computer programs working with nif file - GameBryo model
Click on the software link for more information about GameBryo LightSpeed. GameBryo LightSpeed uses nif file type for its internal purposes and/or also by different way than common edit or open file actions (eg. to install/execute/support an application itself, to store application or user data, configure program etc.).
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