filling the gaps on foam incline sets

Model Railroader Layouts and layout building
1

I used the foam incline sets from woodland scenics how do I fill the gaps on the sides and on the top

2

In places, I used some of these and I’m planning on using a type of plaster cloth bought from a medical supply house to drape down the sides starting at the edge of the trackbed or maybe even under it.
I’m interested to see what others have done.
Jarrell

3

I used plaster cloth to cover it.

4

I run corkbed on top (this answers the “top” part) and plastercloth (have used WS and medical - if you have a source the medical is denser and less expensive) on the sides. I usually do some basic scenery to bring the scenic section up to the foam incline and then tie in with the plastercloth.
Ron K.