Most glass doesn't render well in Eevee because it can't handle multiple layers of refractions. You'll only see the front faces and any other refractive objects behind it will be invisible.
The CGC Eevee Glass shader doesn't fix that fundamental issue, but it does cleverly disguise it by giving you more control over which parts of your object are refractive or simply transparent. The result is glass that is much more believable!
To use the CGC Eevee Glass Shader, download the .blend file using the cloud download icon above. Then,
For documentation, refer to the video above or the Blender Market docs: https://blendermarket.com/products/all-purpose-eevee-glass-shader/docs
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