Display problems with spline integration

I made a website with a spline Integration.
On different Devices and browsers different aerious cloudy artefacts appear, for example on
MacBook Air M2, macOs 14.1.2 Safari, also on different windows setups on every tested browser.
No Problems on other setups. I played around with background, resolution and light settings. Still artefacts.


I suppose it has something to do with spline.com render Settings.

Can anybody help?

Looks like low resolution shadows. Have you tried disabling shadow casting to see if it’s gone.