Here is a free tree trunk which is part of the Rookie game! It has 78 triangles, includes a colour, bump and specular map. This is a general asset which will be found scattered across the Incanto landscape. The model will be part of the Alpha 1 release.
It is modeled and textured by Aaron Eads and is featured in his tutorial: http://www.youtube.com/watch?v=WGY9FZZwbRw\