The OpenGL options manage display options for OpenGL accelerator graphics cards.

OpenGL Options

Use accelerated hardware modes

Uses hardware acceleration. Turn this option off if the OpenGL acceleration causes problems with Rhino.

Redraw scene when viewports are exposed

Ensures that viewports that are in a rendered state will refresh correctly when other windows are dragged over them.

Do not use OpenGL for drawing feedback items

Uses Windows display for drawing feedback (object selection highlight, for example).

Use Texture Compression

Images are compressed as they are stored in memory. When the image is used, it is decompressed. Since the compression is lossy, the results can sometimes appear degraded over the original. Textures can compress up to a 4-to-1 ratio, freeing up video memory.

Appearance Settings






Mip Map Filtering

Mip map filtering improves the quality of textures based on distance or space occupied. Mip maps are generated when the texture image is first loaded, and the number of maps created depends on the original image size. For example: If you load a 1024x1024 image, Rhino will create similar, sampled images based on the original in the following resolutions: 512x512, 256x256, 128x128, 64x64, 32x32, 16x16, 8x8, 4x4, 2x2, 1x1 (single pixel). Based on size and distance, textures are chosen from the collection of textures to result in smoother, less grainy images and to moiré patterns.



Anisotropic Filtering

Anisotropic filtering improves the clarity and crispness of textured objects, and enhances the image quality for textures viewed at low angles relative to the camera.

Anisotropic filtering off (left) and on (right).




Video Hardware & Driver Information

Lists information about your system.

To save options


Save Options settings to a file.


Restore Options settings from a file.

Note: When multiple sessions of Rhino are open at one time, changes made in the last Rhino session closed will be saved.

See also

Wikipedia: Mipmap

Rhinoceros 5 © 2010-2015 Robert McNeel & Associates. 17-Sep-2015