to implement the two-sided foliage material in Substrate, try the following:
- set the root node to two-sided
- set the blend mode to masked.
- set the slab “use Subsurface Diffusion” to OFF so it uses wrap-approximation
- plug the subsurface color into the color input of a Strata Translucence-to-mfp, and put a value of 0.01 into the thickness input