Issue with Unexpected Depth of GLB Model in Three.js

Questions
1

Hello everyone,

I hope someone can help me with an issue I’m having while working with Three.js and a GLB model.

Background:

I’m working with a 3D model that I created in Blender. The dimensions of the model in Blender are as follows:

  • Width (X): 8
  • Height (Y): 6.5
  • Depth (Z): 10

Everything looks perfect in Blender, and the bounding box aligns with the model dimensions. However, when I load the exact same GLB file in Three.js, I get an unexpectedly large depth on the Z-axis for the bounding box:

  • Width: 8
  • Height: 6.5
  • Depth: 200 (instead of the expected 10)

grafik
grafik1015×657 23.5 KB

What I’ve Tried So Far:

  • Scaling: The model’s scale is set to (1, 1, 1), and I attempted to adjust the depth with model.scale.set(1, 1, 0.05);, but this distorts the entire model.
  • Bounding Box Check: In Three.js, I used computeBoundingBox() to calculate the bounding box for each mesh node in the model, but the model still shows the incorrect depth.
  • Rotation and Axis Adjustment: I rotated the model 180 degrees in Three.js (model.rotateY(Math.PI);) and reset the rotation to zero to ensure this wasn’t affecting the depth.
  • Console Debugging: I printed all meshes and their bounding boxes in the console. No individual mesh appears to have a depth of 200, but the overall model bounding box still has this large depth.

Export Settings in Blender:

I’m using the GLB export with the following settings:

  • Apply Modifiers
  • +Y Up (since Three.js uses Y-up)

Question:

Why might Three.js be reading the model depth as much larger than it is? I can’t see any hidden geometry in Blender, and I’ve re-exported the model after applying all transformations (Ctrl + A → Apply All Transforms). Does anyone have any ideas about what might be causing this or what I might have overlooked?

I’d appreciate any tips or suggestions!

Thank you in advance!

2

Send here model. Maybe there invisible vertice

3

Are there any modifiers on the object in blender?

5

Hi kalabedo

Thanks for your reply :slight_smile:
Blender is a new Topic to me. So let me try to figure that out.
I have added the glb model to my last reply.

1 Like
6

thank you very much! It looks like this was the problem :smiley:

1 Like