De-Instance materials

Submitted by David_Lee on Sun, 2013-06-30 10:40

I need to rename all the SubMaterials in scene adding a "Sub_" prefix.
To doing this, I wrote a simple script:

for o in sceneMaterials do
(
        if (classof o == Multimaterial) then 
	(
		for i in o.materialIdList do
		(
			try
			(
				subo = o[i]
				subo.name = "Sub_"+subo.name
			)
			catch()
		)
	)
)

But the problem is that sometimes, a submaterial is an instance of another material in scene and if I rename the submaterial, the master material is renamed too.
So, how can I check if the submaterial is an instance and, if it is, make it unique and then rename it?

Someone could help me, please?

Thanks,
David

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miauu's picture
Submitted by miauu on Mon, 2013-07-01 00:41.

To find all instances of a

To find all instances of a material check this

To make material unique see what is written in maxscript help file:

assignNewName <material>

Modifies the name of the specified material to make it unique. The name is of the form "Material #1" where the number is incremented as required to make ensure it’s unique.

Tools and Scripts for Autodesk 3dsMax

David_Lee's picture
Submitted by David_Lee on Mon, 2013-07-01 03:35.

Tried using assignNewName,

Tried using assignNewName, but it doesn't make the submaterial unique. It rename both submaterial and master material as "Material #n".

miauu's picture
Submitted by miauu on Mon, 2013-07-01 06:03.

I think I found a sloution:

The first slot in Material Editor is a multisub. All submaterials are instances of subMat[1]

-- the first slot is multisub mterial. All submat-s are instances of submat[1]
msm = meditmaterials[1]
-- get the second submat
-- create a copy
tmp = copy msm[2]
-- assign the copy back 
msm[2] = tmp

Tools and Scripts for Autodesk 3dsMax

miauu's picture
Submitted by miauu on Mon, 2013-07-01 04:33.

Same behaviour here. Maybe we

Same behaviour here. Maybe we don't know how to use it. I started a thread in cgtalk. Hope someoane to gives us the answer. :)

Tools and Scripts for Autodesk 3dsMax

David_Lee's picture
Submitted by David_Lee on Wed, 2013-07-03 00:03.

It works!!

Thanks a lot miauu!!
I know how to use it, I have the answer! :)

for o in sceneMaterials do
(
        if (classof o == Multimaterial) then 
	(
		for i in o.materialIdList do
		(
			try
			(
				subo = o[i]
				tmp = copy subo
				o[i] = tmp
				o[i].name = "Sub_"+subo.name
			)
			catch()
		)
	)
)

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