How to do this?

[Supertint]

Hi, I have been trying to get the terrain to match up with the sidewalk, like in this pic.  I have tried F3/shift, but all it says is gravel and concrete cube.  When I place terrain against these blocks at the large joe builders location, it works, but if I place my own block with terrain...



Suggestions?  Thank you!!!

 

[Beelzybub]

Suggestions?

Use a plate to cover the gap.