Hey guys,
We just want to let you know that we’ve finished our first alpha release candidate (0.8.0) and have begun testing. If you’re interested in testing out release candidate with us, let us know through Twitter or send us an e-mail at info [at] so we can fix an invite for you!
Good suggestion, will try to put that in next time 
We would recommend other middleware options for that (Speedtree?), since grass is mostly flat-ish and hardly has any volume for Tendr to be useful. Flat objects can already be done quite well with existing surface-based techniques. You’d have to think more in terms of objects that have some degree of volume, such as frogs, tires, etc.