I have noticed this lately. If you try to make any cut or copy operation to clipboard from any geometry, even if the geometry has no materials and is not heavy, because the file does have a lot of materials, copying takes a lot of time. Check this. I count 11 seconds to cut a newly created box. …

Maybe this is silly or useless - however if I may ask: is this a downloaded ‘3D map model’? When dealing with downloaded/imported assets I’ve have to run this combo numerous times: Check for bad objects, check for and delete duplicates, explode blocks (not always necessary), and purge.

Hi @ShynnSup , CopyToClipboard is a file i/o operation - essentially export selected. Most times, the venerable Copy command is a quicker option if you are not pasting into another .3dm file. – Dale

[image] Dale Fugier: Most times, the venerable Copy command is a quicker option if you are not pasting into another .3dm file. Yes I am copying into another file. It still does not explain why it takes 11 seconds to copy/export a single box. The size of the file or how many textures/material…

[image] René Corella: Check for bad objects, check for and delete duplicates, explode blocks (not always necessary), and purge. Thanks. The problem seems to be that Rhino sucks at dealing with materials. Even if you try to delete them all, Rhino will just crash trying to do so.

[image] Dale Fugier: Is Export roughly as slow? Just tried, not at all. It took less than a second.

[image] Shynn Sup: Thanks. The problem seems to be that Rhino sucks at dealing with materials. Even if you try to delete them all, Rhino will just crash trying to do so. Please post the necessary information to understand the issue. Thanks [image] Please read this if you are logging a bug…

[image] Japhy: Please post the necessary information to understand the issue. Thanks Hi Japhy, this has been talked extensively, I believe no extra info is required. [image] Why is Rhino so bad at dealing with materials? Rendering I am talking about UX, UI and perf…

Hi - [image] Shynn Sup: this has been talked extensively, I believe no extra info is required. I’ve just read through those threads and other threads that were linked to from those, i.e, several hundreds of posts. Yes, this has been talked about extensively, but I couldn’t find one sample 3d…

Guys just to be clear, I don’t know what causes the clipboard copy/cut lag. It was just an intuition. @wim I have just uploaded the file shown in my original post of this thread.

Why Does Clipboard Copy Slow Down with Many File Materials?

Rendering

Japhy (Japhy) April 30, 2025, 12:59am 8

Please post the necessary information to understand the issue. Thanks

Topic		Replies	Views
Incredibly Slow Saving and Copy Paste Files Rhino windows	15	1834	September 16, 2026
Rhino 6 slow with pasting even small objects Rhino for Windows	46	4874	February 6, 2024
Copy and paste slow Rhino for Windows	66	8762	June 3, 2025
Rhino 6: copying to the clipboard take very long Rhino for Windows	12	2005	July 20, 2018
PLEASE: Copy to clipboard needs an update asap Rhino for Windows	5	1241	February 7, 2020

Why Does Clipboard Copy Slow Down with Many File Materials?

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