| rip | RIP Image |
| rix | ColorRIX VGA Paint Image |
| rk6 | RockWorks Plot Data |
| rkw | RockWorks Plot Data |
| rl4 | Windows Bitmap Image |
| rl8 | SageThumbs Bitmap Image |
| Windows Bitmap Image |
| rla | Autodesk Maya RLA Image |
| Run-Length Encoded Image |
| rlb | Run-Length Encoded Image |
| rlc | RLC Graphic |
| rlc1 | RLC Graphic |
| rlc2 | RLC Graphic |
| rle | ADEX Corporation Bitmap |
| Intergraph Format Bitmap Image |
| Run-Length Encoded Bitmap |
| rli | RealWorld Layered Image |
| rm0 | RAMbrandt Picture |
| rm1 | RAMbrandt Picture |
| rm2 | RAMbrandt Picture |
| rm3 | RAMbrandt Picture |
| rm4 | RAMbrandt Picture |
| rmd | Rate My Drawings Document |
| rna | Revelation Natural Art Document |
| rnd | Autodesk AutoShade Output |
| rnl | GTXRaster CAD Runlength Encoded Bitmap |
| rp | Rainbow Painter Image |
| RealPix Clip |
| rpbm | Portable Bitmap Image |
| rpf | Alias Wavefront Bitmap Image |
| Run-Length Encoded Image |
| rpgm | Portable Graymap Image |
| rpm | C64 RunPaint Multicolor Image |
| rpnm | Portable Anymap Image |
| rppm | Portable Pixmap Image |
| rpx | Oracle Visual Information Retrieval RAW Pixel Format Data |
| rri | RealWorld Raster Image |
| rs | Sun Raster Image |
| rsb | Red Storm Bitmap Image |
| rst | Atari ST NEOchrome Master Image |
| rtex | Rhino 3D Texture Data |
| rtl | HP Raster Transfer Language |
| rvg | Digital Radiography System Image |
| rvs | RasterVect Graphics Data |
| rw2 | Panasonic LX3 RAW Image |
| rwl | Leica RAW Image |
| rwz | Rawzor Compressed Image |
| rys | Mamut Bitmap Image |
| s1c | MSX2+ Screen 12 Bitmap Image |
| s1g | Sealed GIF Image |
| s3tc | S3TC Compressed Texture Data |
| sai | PaintTool SAI Drawing |
| sai2 | PaintTool SAI v2 Drawing |
| sar | C64 Saracen Paint Image |
| sbig | SBIG Astronomical Image |
| sc | Kodak Trophy SC Image |
| Scitex Continuous Tone |
| sc0 | Atari ST Paintworks Image |
| sc1 | Atari ST Paintworks Image |
| sc2 | Atari ST Paintworks Image |
| MSX 2 Screen Bitmap |
| sc4 | MSX2 Screen 4 Bitmap Image |
| sc5 | MSX2 Screen 5 Bitmap |
| sc7 | MSX2 Screen 7 Bitmap |
| sc8 | MSX2 Screen 8 Bitmap |
| sca | MSX2+ Screen 10 Bitmap |
| scan | ThunderScan Image |
| scc | MSX2+ Screen 12 Bitmap Image |
| scd | SCODL Slide Image |
| scg | ColorRIX VGA Paint Image |
| sci | ColorRIX VGA Paint Image |
| scitex | Scitex Continuous Tone |
| scn | TreePaint Screen Image |
| scodl | SCODL Slide Image |
| scp | ColoRIX Bitmap Graphic |
| scr | Amstrad CPC Advanced OCP Art Studio Image |
| Screen Capture Image |
| Timex 2048 Hi-color Screen Image |
| screenshot | CrossGL SnapDraw Screenshot |
| scs4 | SAM Coupe Bitmap Image |
