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3ds max changes material ids!

Started by JohnnyCode Dec 9, 2011 at 1:35 PM 1 replies 3.3k views

Original Post

326

Dec 9, 2011 at 1:35 PM

Hello,
3ds max changes polygon ids when I assign a material to the selected polygons. For example if I have 2 ids and assign identical material to both ids, my ids become 1. Or for example if I have 4 ids and assign to id 2 a texture that is the same texture as the one on id 3, then id 2 becomes id 3. It is very disturbing. Material ids are hardly made asset defining the geometry, so why max considers them as a subjet to change at any spot?

Kryzon

302

Kryzon

Dec 9, 2011 at 9:28 PM

Because these IDs point to sub-materials of a Multi\Sub-Object Material, so 3DS Max automatically detects that you're trying to assign the same material to different polygons and changes the polygon's ID to match the sub-object element.

After you apply more than one material to different polygons of the same mesh, the main mesh's material becomes a hidden Multi\Sub-Object material. You can edit this hidden material by selecting an unused slot in the material editor, pushing the eye-dropper icon (named "Pick Material from Object"), to the left of the material's name, and picking your mesh in the scene. This slot will then represent this mesh's Multi\Sub-Object material, and each of those ID's you see in the list will correspond to polygon's material IDs.

I agree it is a bit unintuitive the way it works, but since there's no easy way out of this I suggest you clone materials (drag a slot to another slot and rename) and find other ways to do what you want.

JohnnyCode

Author

326

JohnnyCode

Dec 12, 2011 at 5:45 PM

I have solved it by just drag-droping the texture file straight from the directory onto selected faces. So I can view and edit uv mapping on a given texture, luckily this does not redefine my mat ids.

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