Bug 248339

Summary:

Babylon.js Shadows are incorrect on iOS with WebGL via Metal

Product:

WebKit

Reporter:

dizel3d <dizel3d>

Component:

ANGLE

Assignee:

Nobody <webkit-unassigned>

Status:

NEW ---

Severity:

Normal

CC:

dino, djg, kbr, kkinnunen, kpiddington, webkit-bug-importer

Priority:

Keywords:

InRadar

Version:

Safari 16

Hardware:

iPhone / iPad

OS:

iOS 16

URL:

https://forum.babylonjs.com/t/pcf-looks-bad-on-ios/35988

Attachments:

Description	Flags
iOS 15.5 Safari	none
MacOS 12.6.1 Chrome, reference	none
iOS 15.5 Safari with disabled WebGL via Metal	none

Description dizel3d 2022-11-25 02:50:47 PST

Created attachment 463724 [details]
iOS 15.5 Safari

I use Babylon.js. And I faced with an issue connection with shadow rendering. Shadows with PCF look ugly on iOS 15+ until disabling the WebGL via Metal experimental feature in Safari.
Original thread on Babylon.js Forum has more details: https://forum.babylonjs.com/t/pcf-looks-bad-on-ios/35988

Comment 1 dizel3d 2022-11-25 02:54:22 PST

Created attachment 463725 [details]
MacOS 12.6.1 Chrome, reference

Comment 2 dizel3d 2022-11-25 03:06:43 PST

Created attachment 463726 [details]
iOS 15.5 Safari with disabled WebGL via Metal

Comment 3 dizel3d 2022-11-25 03:08:40 PST

Here's a test example https://playground.babylonjs.com/#IIZ9UU#369

On iOS 15.5 Safari with ENABLED WebGL via Metal looks INCORRECTLY:
https://bugs.webkit.org/attachment.cgi?id=463724

On iOS 15.5 Safari with DISABLED WebGL via Metal CORRECTLY:
https://bugs.webkit.org/attachment.cgi?id=463726

Comment 4 Radar WebKit Bug Importer 2022-11-26 14:41:23 PST

<rdar://problem/102683818>

Comment 5 Kenneth Russell 2022-11-28 15:25:30 PST

I think this is a duplicate of Bug 232071. It's related to the filterability of depth textures when using certain depth compare modes.