The.mtl display of the.obj file is incomplete

Questions
1

May I ask why the display of.mtl file loaded by.obj is incomplete。
Whether to load the.obj file requires additional steps.
This is the original model

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1704851154790949×785 106 KB

This is the loaded model
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1704851259314990×729 91.8 KB

IronMan.zip (4.2 MB)
But in threejs you can load the full display

2

How are you loading the file? You can share a Playground https://playground.babylonjs.com/ with your code. Here’s how you can load your assets on it: Using External Assets In the Playground | Babylon.js Documentation (babylonjs.com). MTLs are loaded by default as long as it can find a reference to it, as per this example: Babylon.js Playground (babylonjs.com)

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3

This is what I see in the sandbox by disabling point clouds on the materials

image
image1189×1441 116 KB

4

And why can the sandbox drag freely, but my model can not drag like the sandbox silky, may I ask my code is still missing that step, or my model problem?

5

Can screenshot your configuration, why can’t my sandbox load found.mtl, prompt “Not allowed to load local resource: file://./IronMan.mtl”

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17049427342471920×861 53 KB

6

Here it is https://www.babylonjs-playground.com/#58EXJB#21

in the sandbox you need to drag both files at once for it to work

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