Weight

Note that you must also disable Opaque for the mesh that has been assigned the Standard Surface shader.

If you can only see black where there should be transparency, you may not have a high enough refraction ray depth value (found in the Ray Depth section of the Render Settings). The default value is two.

Color

Depth

Scatter

Scatter Anisotropy

Dispersion Abbe

Extra Roughness

Transmit AOVs