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| Extension | File Type Developer | File Category | File Type Description | Primary Software | Primary Software Developer |
|---|---|---|---|---|---|
| .RAD | Reality Pump Studios | 3D Image Files | Reality Adlib Tracker Module | Adlib Tracker II | Adlib Tracker II |
| .RAV | Nevrona Designs | 3D Image Files | Rave Reports Project File | Rave Reports | Nevrona Designs |
| .RAW | Unknown Developer | 3D Image Files | Raw Image Data File | MacPhun ColorStrokes | Macphun |
| .RAY | Craig Kolb | 3D Image Files | Rayshade Image File | Rayshade | Craig Kolb |
| .RCS | RandomControl | 3D Image Files | RandomControl Scene File | RandomControl Fryrender | RandomControl |
| .RDS | DAZ 3D | 3D Image Files | Ray Dream Studio Scene File | DAZ Studio | DAZ 3D |
| .RFT | Autodesk, Inc. | 3D Image Files | Revit Family Template File | AutoCAD Architecture | Autodesk, Inc. |
| .RIB | Pixar | 3D Image Files | Renderman Interface Bytestream 3D Graphics File | RenderMan | Pixar |
| .RIG | Iterum, LLC | 3D Image Files | vRigger Design File | Iterum vRigger | Iterum, LLC |
| .RS | Pierre-Emmanuel Gougelet | 3D Image Files | Sun Raster Bitmap Image | XnView MP | XnSoft |
| .RVM | Eidos Interactive | 3D Image Files | Revenant Game Archive | Revenant | Cinematix Studios, Inc. |
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