# Fun with Sketchfab plugin in Blender, testing glTF performance

**URL:** https://forum.castle-engine.io/t/fun-with-sketchfab-plugin-in-blender-testing-gltf-performance/137
**Category:** News
**Created:** [April 11, 2020, 6:17pm UTC](https://forum.castle-engine.io/t/fun-with-sketchfab-plugin-in-blender-testing-gltf-performance/137 "2020-04-11T18:17:11Z")
**Posts on this page:** 1
**Page:** 1

<div class="post-metadata">

### Author: ![michalis](https://forum.castle-engine.io/user_avatar/forum.castle-engine.io/michalis/32/3_2.png) [@michalis](https://forum.castle-engine.io/u/michalis)
#### Post date: [April 11, 2020, 6:17pm UTC](https://forum.castle-engine.io/t/fun-with-sketchfab-plugin-in-blender-testing-gltf-performance/137/1 "2020-04-11T18:17:11Z")

</div>

| [![1_cats_blender](https://castle-engine.io/wp/wp-content/uploads/2020/04/1_cats_blender-200x105.png)](https://castle-engine.io/wp/wp-content/uploads/2020/04/1_cats_blender.png "1\_cats\_blender") |
| [![1_cats_cge](https://castle-engine.io/wp/wp-content/uploads/2020/04/1_cats_cge-200x121.png)](https://castle-engine.io/wp/wp-content/uploads/2020/04/1_cats_cge.png "1\_cats\_cge") |
| [![2_room_blender](https://castle-engine.io/wp/wp-content/uploads/2020/04/2_room_blender-200x105.png)](https://castle-engine.io/wp/wp-content/uploads/2020/04/2_room_blender.png "2\_room\_blender") |
| [![2_room_cge](https://castle-engine.io/wp/wp-content/uploads/2020/04/2_room_cge-200x113.png)](https://castle-engine.io/wp/wp-content/uploads/2020/04/2_room_cge.png "2\_room\_cge") |
| [![3_jack_blender](https://castle-engine.io/wp/wp-content/uploads/2020/04/3_jack_blender-200x105.png)](https://castle-engine.io/wp/wp-content/uploads/2020/04/3_jack_blender.png "3\_jack\_blender") |
| [![3_jack_cge_0](https://castle-engine.io/wp/wp-content/uploads/2020/04/3_jack_cge_0-200x113.png)](https://castle-engine.io/wp/wp-content/uploads/2020/04/3_jack_cge_0.png "3\_jack\_cge\_0") |
| [![3_jack_cge_1](https://castle-engine.io/wp/wp-content/uploads/2020/04/3_jack_cge_1-200x113.png)](https://castle-engine.io/wp/wp-content/uploads/2020/04/3_jack_cge_1.png "3\_jack\_cge\_1") |

- [Sketchfab addon for Blender](https://github.com/sketchfab/blender-plugin/releases/latest) is lots of fun. You can search and download Sketchfab models straight into [Blender](https://www.blender.org/) and then export from Blender to [glTF](https://castle-engine.io/creating_data_model_formats.php) and open it in our engine. On the side you can see screenshots when I had some fun with it 🙂

- To test performance, I implemented a `GltfForcePhongMaterials` toggle. It’s somewhat internal now, in `X3DLoadInternalGLTF` unit, and I don’t know yet whether I will make it “official” (move it to non-internal unit). Toggling it to true will force glTF importing to use old Phong materials, which are uglier, but may be much faster than PBR materials (esp. when you use Phong lighting model with Gouraud shading).