yes demo
url https://sandbox.babylonjs.com/
add glb https://www.3dyzt.com/00/demo/demo.glb
==========
but
url https://playground.babylonjs.com/#1JLGFP#922
camera flicker bug
yes demo
url https://sandbox.babylonjs.com/
add glb https://www.3dyzt.com/00/demo/demo.glb
==========
but
url https://playground.babylonjs.com/#1JLGFP#922
camera flicker bug
I removed your camera settings, there is no flicker anymore - https://playground.babylonjs.com/#1JLGFP#923
You may find yourself which settings makes flicker adding camera settings one by one.
https://sandbox.babylonjs.com/
How did the camera solve the problem
Your Playground has incorrect camera settings. The Sandbox has correct camera settings. You may have a look here - Babylon.js/packages/tools/sandbox/src/components/renderingZone.tsx at master · BabylonJS/Babylon.js · GitHub
yes demo
camera.minZ = 200;
There is no flashing at this time