Hi, if I load gltf models with transmission on Babylon sandbox, rendering is broken, as if the color buffer is never cleared (but sometimes, errors are different). Everything was working fine with Safari 15.3, and works perfectly in Chrome. I would attach a sample glb if I could find a way to do it…

Yup, looks same as Possible upcoming iOS 15.4 bug - #4 by br-matt Please bump my WebKit issue : )

I found the problem only in gltf models with transmission tought - was it the same for you?

I am not sure what the link is. I see it on seemingly random playgrounds but not others. Babylon.js Playground this one for instance has the issue but I don’t think any transmission going on

I don’t see the issue in that playground, but I have seen my issues come and go randomly. Sometimes, they simply disappear, most often they are there. My issues with transmission are, I think, related with rendering to texture, if the glow is done with that technique, it could be the same issue

more specifically, this is the problem, in my opinion: 237906 – After 15.4, WebGL renders to offscreen buffer, then back to on-screen, are super broken (strobing, flashing, wrong textures)

Did you try moving the camera around on that PG ? it only happens once you do

also, I saw that visual issues are not exactly the same on Mac/iOS. I tried the playground on a Mac.

This looks so broken I hope Safari will address this … :frowning:

We need to find a quick workaround as this starts to propagate more and more ShadowGenerator causing rendering artifacts in Safari 15.4 - #2 by sebavan

Broken rendering in gltf models with transmission on safari 15.4 on M1/iOS devices?

Bugs

sebavan March 16, 2022, 4:45pm 10

This looks so broken I hope Safari will address this …

ShadowGenerator causing rendering artifacts in Safari 15.4

Topic		Replies	Views
ShadowGenerator causing rendering artifacts in Safari 15.4 Bugs	13	1510	March 21, 2022
Possible upcoming iOS 15.4 bug Bugs	33	3229	May 19, 2022
Unable To Load GLB Models On iOS Safari 16.2 Bugs	22	1837	January 10, 2023
iOS / Safari bug fixed? Bugs	3	505	May 16, 2022
Safari (Mac) Bug: GLB Fails to Load After Create Screenshot Using Render Target Bugs	16	268	February 6, 2025

Broken rendering in gltf models with transmission on safari 15.4 on M1/iOS devices?

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