The grass will not show up when I create the material called “Grass”. I am using the most up to date version of Enscape with Revit 2019.2. I get an error code in my material browser that says “for improved rendering, replace the current appearance asset in this material with a newer version”. The box render grass is checked under my settings.
Hey @mwynne19 , thank you very much for your report and welcome to our forum! 
I know it’s a very trivial question, but have you made very sure that the corresponding material has been applied to the area on which you want to render our grass? In case you have, can you please send us the project, or an example project (or part of the project) which includes this corresponding material so that I can troubleshoot the cause behind this issue?