3D Tree Chess Board Modification To Add Texture

Looking for a 3D modeler to modify an existing STL model of a tree like chess board. Existing model is solidworks generated and has no realistic texture. Focus would be adding physical detail and texture. Mainly adding bark and modifying the roots to look more realistic.

Requirements

-Modify roots for a realistic appearance. Branches are kind of stuck in the shape due to the rigidity of the board tiles, but the roots can be modified to look more natural. -Add texture: Rough bark on the thick trunk, getting smoother at narrow sections of branches, idea is to resemble an old gnarled oak tree. -No color or shading needed, the intent of this final model is to be 3d printed and cast into metal. Ideal Skills: -Proficiency in working with STL files -Experience in texturing and detailing organic models Model is to big to be uploaded in this description, however a JPEG of the object is included. Let me know if you have any questions Thanks!