How to Fix Many Attached Objects in 3ds Max Without Remodeling (Substitute Modifier Workflow)

I was modeling a bath mixer recently when I noticed a mistake in the nozzles. There were 46 of them, all attached into one object, and all of them had the same problem. My first thought was the usual one: I’ll have to remodel this whole section.

It turns out there’s a much faster way. I fix one nozzle, and every other nozzle updates with it. Here’s the workflow I used, step by step.

The problem

When many similar parts are attached into a single mesh, fixing a shared mistake normally means editing each one by hand, or remodeling one and rebuilding the section around it. With 46 pieces, that is a lot of repeated work, and it is easy to introduce small differences between them.

The idea is to turn the attached mesh back into separate objects, then let one corrected object replace all the others.

What you need

• AttachDetach (free script) to split the attached mesh into separate objects: [LINK]
• Object Placement Manager (paid script) to set the same pivot on all objects: [LINK]

You don’t have to use my pivot tool. Any method that gives every object a consistent pivot will work. I use Object Placement Manager because it’s already part of my daily workflow.

Step 2: Give all objects the same pivot

Substitute swaps objects based on each object’s transform, so the pivots need to be consistent. Set the same pivot position on every nozzle. I use Object Placement Manager for this, but plenty of other tools can do it.

Step 3: Reset XForm

Select all the nozzles and run Reset XForm. This clears leftover rotation and scale so every object starts from a clean state. Collapse the stack afterward if you want it tidy.

Step 4: Fix one nozzle

Make a copy of one of the nozzles and correct the mistake on that copy. Keeping the original untouched means you can always go back if something goes wrong.

Step 5: Apply the Substitute modifier

Select all the original nozzles and add the Substitute modifier. Click Pick Scene Object and select the corrected copy. All 46 nozzles update at once.

That is the whole fix: one correction, many objects updated.

Why this works

Substitute lets many objects share one source. Because the pivots are consistent and the transforms are reset, the replacement lines up on each object. If you later notice another issue, you edit the source once and everything follows.

Where this is useful

Any time you have repeated parts that were attached together: nozzles, screws, perforations, vents, grille bars, handles. It also helps with downloaded models that arrive as one merged mesh and need a small shared change.

Get the scripts

• AttachDetach (free): [LINK]
• Object Placement Manager (paid): [LINK]

I build these tools to solve problems I hit during real modeling work, and I’m still refining them as I go. If you have a workflow that handles this differently, I’d like to hear it in the comments.

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