# News in Simplygon 9.1
# Preview -> Public: Standalone UE4 plugin
New standalone Simplygon UE4 plugin, reducing need for tedious Unreal Engine 4 source code merging, has been brought from preview to public in Simplygon 9.1 release.
# New impostor processor
Totally revamped impostor processor to be used vegetation and flat surface objects. Read more about how to get started with new impostor processor for two different use cases in these two blog posts:
# FASTBuild and Incredibuild support
In addition to our native lightweight distributed build system Simplygon Grid we have in Simplygon 9.1 added support for commercial Incredibuild (opens new window) and open source FASTBuild (opens new window) build systems enabling more options for optimization processes distribution.
# New file formats: USD and Alembic
Support for two new file formats has been added in Simplygon API: Alembic (opens new window) and USD (opens new window) expanding our file format support to: FBX, USD, glTF, Alembic and OBJ in the Simplygon API.
# New plugins in preview: Unity, Blender & Houdini
With Simplygon 9.1 and new Unity, Blender and Houdini integrations we have taken huge steps bringing Simplygon to a wider 3D games community. Integrations are still in preview so we'll love to hear back from you and evolve these integrations based on your feedback.