2.8 Principled glass shader doesn't show any thickness? - Blender Stack Exchange
Blender Eevee alpha: I know it's only in alpha but why is it not showing my wooden planks through the glass? It's only refracting the environment. Is it not yet possible to
How to get realistic Caustics glass shadow in Blender 2.8 using the eevee render engine? - Lighting and Rendering - Blender Artists Community