3ds Max Copy And Paste Script -

Before you start, ensure you know how to access the MAXScript Editor in 3ds Max:

Now, let's write a simple script:

-- Copy and Paste Script for 3ds Max
-- Function to copy and paste objects
fn copyAndPaste =
(
    -- Get the selection
    sel = selection as array
-- If there's something selected
    if (sel.count > 0) do
    (
        -- For each selected object
        for obj in sel do
        (
            -- Clone the object (copy)
            newObj = obj.clone
-- Position the new object slightly offset for visibility
            newObj.pos = obj.pos + [10, 10, 10]
-- Add the new object to the scene
            newObj.wirecolor = [1,0,0] -- Color the copy red for distinction
        )
    )
    else
    (
        messagebox "Please select an object to copy."
    )
)
-- Call the function
copyAndPaste()

Let's explain what this script does:

To use this script:

To Save and Use the Script as a Tool:

This is a basic script. Depending on your needs, you might want to enhance it, for example, by adding keyboard shortcuts, modifying the cloning process, or adjusting the position of the cloned objects.

fn pasteObjects atOriginalPos:true offset:[0,0,0] =
(
    if copiedObjectsData.count == 0 do
    (
        messageBox "Nothing to paste. Copy objects first." title:"Paste Error"
        return false
    )
local pastedObjects = #()
for objData in copiedObjectsData do
(
    local newObj = undefined
    local objClass = getProperty objData #class
    local objName = getProperty objData #name
-- Create object based on stored data
    local hasMesh = findItem (getPropNames objData) #mesh > 0
    if hasMesh then
    (
        local meshData = getProperty objData #mesh
        newObj = snapshot meshData
    )
    else
    (
        -- Create dummy helper if no geometry
        newObj = point name:(objName + "_copy") size:10
    )
-- Apply transform
    if atOriginalPos then
        newObj.transform = getProperty objData #transform
    else
        newObj.pos = offset
-- Apply modifiers
    local mods = getProperty objData #modifiers
    if mods != undefined do
    (
        for m in mods do
            addModifier newObj m
    )
-- Apply material
    local mat = getProperty objData #material
    if mat != undefined do
        newObj.material = mat
-- Apply wirecolor
    local wc = getProperty objData #wirecolor
    if wc != undefined do
        newObj.wirecolor = wc
newObj.name = uniquename (objName + "_copy")
    append pastedObjects newObj
)
select pastedObjects
format "Pasted % object(s)\n" pastedObjects.count
return true

)

Store data in %appdata%\Autodesk\3dsMax\clipboard.dat – survives Max restarts.

rollout copyPasteUI "Copy/Paste Tool" width:320
(
    checkbox chkTransform "Transform" checked:true
    checkbox chkGeo "Geometry" checked:true
    checkbox chkMods "Modifiers" checked:true
    checkbox chkMat "Materials" checked:true
radioButtons copyMode labels:#("Copy", "Instance", "Transform Only")
button btnCopy "Copy Selected" width:140
button btnPaste "Paste" width:140
on btnCopy pressed do
(
    local mode = case copyMode.state of
    (
        1: #full
        2: #instance
        3: #transformOnly
    )
    copySelectedObjects mode
)
on btnPaste pressed do
(
    pasteObjects atOriginalPos:true
)

)
createDialog copyPasteUI

Before diving into the script, we must understand the limitation of the native system. In 3ds Max, when you select an object and press Ctrl+C, you are copying a reference pointer to the object's location in the current scene's memory. When you press Ctrl+V, Max creates an instance or copy of that object within the same .max file.

This works fine for duplicating a chair leg ten times. However, try to open File A (a character model) and File B (a new scene), copy the character in File A, switch to File B, and paste it. It won't work. The clipboard empties the moment you close or switch the active document.

The workaround? File > Import > Merge. While functional, merging is slow. It requires navigating through dialog boxes, searching through object lists, and manually selecting what you need. If you need to copy-paste thirty times in an hour, Merge kills your creative flow.

Enter the Copy and Paste Script. This script hijacks the Windows clipboard or creates a persistent memory buffer that survives session changes.

Out of the box, 3ds Max provides a standard clipboard functionality rooted in the Windows Operating System’s OLE (Object Linking and Embedding) framework. When a user performs a native "Copy" (Ctrl+C) and "Paste" (Ctrl+V), the software attempts to duplicate the scene object entirely. This native process is often cumbersome, triggering a dialog box asking the user to choose between Copy, Instance, or Reference.

The friction arises because the native system treats objects as monolithic entities. It copies the geometry, the topology, and the transforms. However, in a high-production pipeline, an artist rarely wants to duplicate the whole object in that specific moment. They may only want the transform (position, rotation, scale), or they may want to paste the attributes (material IDs, mapping channels) onto an entirely different object.

This is where the "Copy and Paste Script" transcends utility and becomes a philosophical tool. It shifts the definition of "the object" from a physical entity to a collection of data vectors.

-- Global storage for clipboard data
global copiedObjectsData = #()
fn copySelectedObjects copyMode transformOnly:false =
(
if selection.count == 0 do
(
messageBox "No objects selected." title:"Copy Error"
return false
)
copiedObjectsData = #()
for obj in selection do
(
    local objData = #()
-- Store name and class
    append objData #name (obj.name)
    append objData #class (classof obj)
-- Store transform (position, rotation, scale)
    if transformOnly == false or copyMode != #transformOnly do
    (
        append objData #transform (obj.transform)
    )
-- Store geometry (if copying mesh)
    if copyMode == #full or copyMode == #instance do
    (
        if isKindOf obj GeometryClass do
        (
            append objData #mesh (copy obj.mesh)
        )
    )
-- Store modifier stack
    if copyMode == #full do
    (
        local mods = #()
        for m in obj.modifiers do
            append mods (copy m)
        append objData #modifiers mods
    )
-- Store material
    if obj.material != undefined do
        append objData #material (copy obj.material)
-- Store wirecolor
    append objData #wirecolor obj.wirecolor
append copiedObjectsData objData
)
-- Optional: write to external file for cross-session
local file = openFile "$temp/max_clipboard.json" mode:"wt"
format (copiedObjectsData as string) to:file
close file
format "Copied % object(s)\n" selection.count
return true

)