Bug 250388

Summary:	[Regression] Unable to load gltf models on Safari 16.2 with WebKit via Metal
Product:	WebKit	Reporter:	Mike Orozco <me>
Component:	WebGL	Assignee:	Nobody <webkit-unassigned>
Status:	RESOLVED CONFIGURATION CHANGED
Severity:	Major	CC:	ap, dino, kbr, kkinnunen
Priority:	P2
Version:	Safari 16
Hardware:	iPhone / iPad
OS:	iOS 16

Description Mike Orozco 2023-01-10 08:20:23 PST

When loading a gltf model using latest version of BabylonJS, the resulting canvas is empty (white) with nothing rendered inside of it. Also getting extreme lag in the browser & 0 FPS.
There are no errors or warnings given in the developer console.

This issue does not appear when WebGL via Metal is disabled.
It does NOT seem to be consistently affecting all devices.

This was previously working on iOS 15.6.*

Tested on the following devices:
iPhone 13 Pro Max
iPad Pro 5th gen
iPad Pro 6th gen

Example:
https://playground.babylonjs.com/#LMKWQL#6

Comment 1 Mike Orozco 2023-01-10 13:27:49 PST

Looks like this issue does NOT appear in iOS 16.3 beta.

Comment 2 Alexey Proskuryakov 2023-01-10 17:29:06 PST

Thank you for checking the beta! Given your testing, this issue must be fixed in WebKit trunk already.