From BlenderWiki
This panel appears in the Editing Context panel group which is accessed using F9 or clicking
button in the Buttons window.
MetaBalls
All the settings in this panel affect all Meta objects in a group. Other Meta object groups are not affected.
- Wiresize - Changes the mesh resolution from course (0.05) to smooth (1.0). Default (0.4).
- Rendersize - Same as Wiresize except applies only during Rendering. Default (0.2).
- Threshold - The influence that each Meta object has on each other.
- Always - 3D window interactive performance setting. Always evaluate the Meta object while transforming.
- Half Res - Same as Always except at half mesh resolution.
- Fast - Same as Always except no mesh rendered while transforming.
- Never - No mesh rendering at all. The resultant mesh is no longer visible.
