As the title says, I want to change the material’s opacity with camera angel. Do you guys have any example to share here or how to achieve this?
Could you explain with more details what do you mean by “camera angle”? Is it Field of View (camera.fov) or another parameters?
Sounds like a fresnel effect. But in case you just want to link your angel height 
to the material opacity, just use the beta value.
Hi @Paz2012 and welcome to the forum. Please don’t think I am mocking you but a camera angel is such a lovely thought
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It flies through the opacity of the material soul 
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Here is more correct example (angel included).
https://www.babylonjs-playground.com/#19JGPR#59
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