DetachPlus

How it works: Just select a single Editable Poly object (without modifiers) and press the button. No need to select in sub-object mode

You can choose two types of detaching method:
#1 by Elements (every element will be detached to a single object)
#2 by Face Material ID (every Face ID group will be detached to a single object)

Additional Options (see tooltips on checkboxes)

*Randomize Wirecolor* - add random wirecolor to detached objects
*Centralize Pivot* - place pivot at the center of detached objects
*Preserve Normals* - every detached object will preserve existing normals
*Break Multimaterial* - every object will have assigned original material

This tool is requested on this page page by EricRLA , 1rv and harumscarum

update 1.1 now detached object (by MaterialID) will have name "Object Name_Material Name_Unique Number"
update 1.2 now supports Editable Mesh objects
update 1.5 The maxscript is rewritten from scratch
- There is 2 versions: for Max2022 and below and for Max 2023 and up
- Version for Max2023 uses two new functions which was recently added "polyOp.getFacesByMatId" and "meshOp.getFacesByMatId"
- Added support to do detach operation on multiple selected objects
- Improved support for EditablePoly and EditableMesh objects
- UNDO support
- Random Wirecolor option produces more intense colors now
- Preserve Normals affects border edges of Elements or Face ID polygons affer detaching
- Break Multimaterial now works for both methods:
- If detached part has several MatIDs, the tool will asign new multimaterial only with sub-materials which matches with Face ID
- All sub-materials will be instance of original Multimaterial
- All Face ID will be condensed, so if we have for example IDs:3,5,8 on detached part, they will be reseted to IDs:1,2,3
- If detached part has only one FaceID, single material will be assigned