Race Track Builder Patch Notes — May 27, 2026
Aggregated from Steam, cross-tracked with Battle.net coverage on GamePatchNote.
WARNING: This version is not backward compatible, files saved in this version will NOT load in a previous version.
Changes:
- Added: Direct export to Assetto Corsa.
- Added: Import Fbx files without need for XPacker.
- Added: Smartly split large Terrain by grouping by Polygon location rather than just by the Index buffer.
- Added: Naming of Tracks so their name will appear in the export.
- Added: Invisible material and texture for Hidden Walls and Collision objects rather than reusing first texture.
- Added: Ability to switch Edit Modes using 1,2,3,4,5,6 keys.
- Added: Switch Tools using ` key (tilda ~).
- Improved: FBX Export. Removed duplication of materials by re-using them across different meshes.
- Improved: Add Object to roadside better at calculating density.
- Improved: Minimum initial Venue size reduced to 500.
- Improved: Added button to select new object/string/wall rather than having to double-click.
- Improved: Use listboxes instead of comboboxes for object/string filtering.
- Modified: RTB Setting now under the Edit menu instead of File menu.
- Improved: AC Direct export now creates unique String Objects names.
- Fixed: AC FBX export hierarchy not working properly for nested objects, i.e. Moveables, 3d tree.
- Improve: 3d tree so trunk, branches and leave LODs out sooner. LOD model LODs in sooner to avoid disappearance.
- Fixed: AC FBX export String Objects not being offset correctly.
- Improve: AC AI left/right borders set using Centerline Road Left/Right and Pitlane Road Left/Right instead of being hard-coded.
- Fixed: FBX export fix for DiffuseSpecular material.
To try it out, enter the code below into Steam's Beta Code screen (under Properties .. Game Version and Betas).
Steam Beta Code: BTTRWRLD2030