Shader problem in iOS Quicklook

🌵 Needle Engine
1

When I download the GLB file from the cloud and build an app, everything is ok on Android, but on iOS devices there is an error regarding shaders.

Animator (Eveywhere Actions)
Animator (Eveywhere Actions)750Ă—1334 117 KB

[Model downloaded from Needle Cloud]
(https://www.holofiction.hr/playground/webar/needle/gun/uploads_files_4559366_vhs2_v2_parts_basic.glb)

2

Hello Tomislav Štefan! It seems like you’re encountering issues with GLB models specifically on iOS devices when using Quicklook, possibly due to shader compatibility. Let’s tackle this step-by-step:

  1. Verify GLB Compatibility: Ensure the GLB file is fully compatible with the iOS Quicklook specifications. You can use online viewers to check for standard issues: Needle Viewer.

  2. Limit Shader Complexity: iOS tends to be more stringent about shader complexity. Simplify shaders as much as possible or use default PBR shaders present in the GLTF standards.

  3. Check Model Textures & Materials: Textures or materials referenced in the GLB might not be suitable. Make sure you use JPEG or PNG formats and avoid rare or unsupported types.

  4. Log Errors: If iOS provides error messages, try to capture them for specifics on what needs fixing.

  5. Look for Known iOS Issues: Check if there are known issues or updates on iOS that might be affecting Quicklook.

  6. Software or Libraries Version: Ensure that the software used for exporting the GLB is up-to-date as well as libraries like three.js if applicable.

To further assist you, I could use more specific error details you are getting on iOS. If possible, provide logs or detailed error messages.

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3

Hi, just to be clear: this error happens when you try to enter AR on iOS?

4

To understand what’s going on here, we need more info please:

  • a bug report project or a web link where we can reproduce the issue
  • which Needle version you’re using
    Thanks!
5

Yes when I click AR button.
I am using 4.1.0-alpha.13

6

It seems the diffuse textures are not converted correctly, but I can’t tell why from your webpage. Can you please submit a bug report?

7

Thanks, can you send me a link where I can submit a bug report?

8

Do you want me to send you Project files?

9

Could you upload a bugreport ? (via menu item “Needle Engine/Report a bug”)

Thank you

10

https192.168.188.543000pb=105210
https192.168.188.543000pb=105210880Ă—1746 287 KB

I also have problems with the display of SRGB 2D textures under iOS. The texture is displayed black in AR (IOS).

Here to test:
https://cloud.needle.tools/edit/24L37z11a5ab31

11

Hi, we can not access the cloud edit page, please send a direct link to the asset (via the 3 dots menu)

12

here is link to mine

13

https://cloud.needle.tools/view?file=8s9xWMqK8-grlPH-world

14

Hi, it doesnt reproduce on my end with your model so far.

Which iOS versions are you using?

Could you please:

  • Try to send the whole stacktrace of the error message again
  • Upload a bugreport using the menu item in Unity (“Needle Engine/Report a bug”)
15

iOS 16.7.10

16

Sending bug report right now

17

Thanks, got it

18

Thanks, it reproduces now

19

Could you try updating to the latest alpha? It should be fixed there

20

ok will try it now