Base Color
Create Material
Lerp node (linear interpolate) : L + L click
Create Material instance
try 2 different opposite color on inner and outer color, test the fresenl value
Base Parameters
Back to material
Set below 3 nodes with slider Max value to 1
Opacity
Change Material Blend mode from opaque to translucent, to activate Opacity
And then change lighting mode to Surface Translucency volume
Set parameter node to connect
To modify opacity parameters:
Refraction
Promote Parameter by R click on Refraction, then connect as:
Refraction value: min 0.5, max 1.5
Create 2 normal maps (blank one and a cloudy,blurred one)
Drag them in Material event graph
Set Flatness and Tiling value in material instance
Set the option for choosing either normal map or not (by using Switch Parameter node):
Change the dragged blank normal texture into parameter by R click on it
Replace the cloud/blur texture with the blank normal texture:
Connect as:
In mtl instance,
turn on the switch normal parameter, and change the cloud/blur texture if necessary:
Overall, parameters in material instance: