SpeedTree Import Helper is a VFX Grace addon that brings SpeedTree assets into Blender. It reads stmat files and imports ABC, OBJ, and FBX files together in a single batch, and creates material nodes automatically to make the assets quicker and easier to use. The addon supports both the Cycles and Eevee render engines and generates PBR materials during import.
For FBX-format models, it corrects the scale and rotation as part of the process. To keep imports reliable, the developer recommends placing textures, model files, and Smart files in the same folder. A couple of constraints apply: HDF5 ABC files are not supported, and imports in Blender 2.79 should use the Cycles renderer.
Compatibility spans a wide range of Blender releases, from 2.79 through the 3.x and 4.x series up to 5.0, and the addon targets SpeedTree v8.x assets. Installation follows the standard Blender route through Edit, Preferences, and Add-ons, using Install from file. A demo video is available.