OMT officially supports an English UI only. When Blender is set to another language, some built-in Blender labels may be translated automatically, which can result in partially translated or mixed-language UI text.

Yes. OMT has been tested on both Windows and macOS.

Center of Mass is a voxel-based estimate intended as a visual reference for animation and pose balance. It is not a physical simulation. For reliable results, closed meshes are recommended. Open meshes may produce incomplete or inaccurate voxel volumes, so check the Mass Volume preview before using the result as a balance reference.

Relative Analysis is an experimental Motion Check mode that analyzes motion against a Reference Bone to reduce the influence of shared body movement. For normal motion review, World Analysis is recommended. Sharp Angle detection may produce false positives in Relative mode, especially when relative movement is very small.

OMT displays evaluated mesh geometry, so heavy viewport modifiers can affect playback performance. If playback becomes slow, check modifiers such as Mirror, Subdivision Surface, Multiresolution, or other geometry-heavy viewport modifiers. Temporarily disabling unnecessary modifiers, or applying them when appropriate for your workflow, may improve playback performance.

Part Filters let you display specific parts of meshes driven by the Target Armature without splitting those meshes into separate objects. Extra Meshes let you include additional, separate mesh objects in OMT displays.