when previewing and playing my game the back of these stands seem to be invisible. Is this a setting issue, or have I set up the mesh incorrectly?
Yo, I got the same problem - I made some grass but I cant see the backsides of my grass strands but when I click the grass I can see it highlights the “invisible” mesh?
This is most likely a material issue. Check if the material you’re using for your meshes is two-sided or not. To do so, open the material editor, click on the main material node (or on an empty space in the graph) and search the details panel for “Two sided”.
Also, if you’re applying this material to foliage such as grass, change the shading mode to “Two sided foliage”.