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I like the idea of being able to download 3D objects for use in documents,
but they should be uploaded and downloaded as 3D object files, not
extensions, unless you are installing a 3D object library, only then does
an extension make sense. My reasoning is based on a few technical and UX

   1. UX consistency: I work with 3D models of many formats regularly,
   using a variety of software. Never have I downloaded or utilized a 3D model
   as an extension, only as a file, or zip file of multiple models. Using
   extensions would break consistency of user expectations. Think of inserting
   a 3D object as inserting a png. Would you use and extension to do so?
   2. Efficiency and Minimalism: Installing an extension requires extra
   steps and overhead, when a simple "Insert > Object > 3D Model" would
   suffice. Even better would be to offer the ability to insert directly from
   the website, in addition to inserting from a file. Using extensions
   requires you to find and install the extension, then find and insert the
   object. Using extensions to insert objects into a library might be a wash
   here, except that you would then be using the extension manager to manage
   you object library, instead of managing your objects directly in the
   library. I know LO doesn't have a good custom library implementation, but
   it should, especially in Draw.
   3. Affordance and Discovery: Users expect to find their artwork,
   symbols, 3D objects, etc. in a gallery or library. They expect to insert
   any object the same way they would an image, not by way of the extension
   manager. If they want to manage their libraries/galleries, they expect to
   do it by interacting with the galleries/libraries, not by interacting with
   the extension manager.
   4. Technical: By wrapping the 3D model in an extension you unnecessarily
   increase the size of the file, requiring greater storage resources.
   5. Technical: Further development of LO is needed to better handle reuse
   of artwork and objects in custom libraries/galleries, especially in Draw,
   which would be much better than requiring users to package that capability
   in their extensions.

In answer to Bastian, 3D models are neither templates nor extensions. They
are 3D models, graphics, and artwork. I think the new section should be
labeled, "3D Models" or "3D Art".

I would also like to see a section to upload and download shapes or symbols
and symbol libraries for Draw.


On Sat, Dec 17, 2016 at 3:17 AM, Heiko Tietze <>

Impress can handle

JSON - GL Transmission Format
KMZ - Keyhole Markup language zipped

And I would recommend to have 3D models as extensions.

PS: Surprisingly I cannot insert 3D objects in Draw; will file a bug
report -> tdf#104730.

On 12/16/2016 06:58 PM, Andreas Mantke wrote:

Am 16.12.2016 um 08:08 schrieb Heiko Tietze:
Hi all,

this email was waiting for a long time in my inbox. But since we have a
new extensions site now I'd ask you, Andreas, to make this possible.


-------- Forwarded Message --------
Subject: [libreoffice-design] Share 3D models in the new web site for
templates and extensions
Date: Mon, 05 Oct 2015 14:00:26 -0300
From: Bastián Díaz <>

Hello, I have understood that the design team has been working on a
redesign for the website of extensions and templates for LibreOffice.

I wonder if it is possible to add a section to share 3D models for use
in Impress. This feature has been added since LO 4.3, and from my point
of view has great potential in education.

Unfortunately, it is not easy to get 3D models and not all have the
ability to create our own. With a section so the community could
exchange and improve available 3D models.


I wonder, whether this 3D models are templates or extensions. And if
they are some sort of them (which one?), do they have a special file
format and a file extension?

Kind regards,

Dr. Heiko Tietze
UX Designer
Tel. +49 (0)179/1268509

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