Release notes:

• Fix ArcTan operator (which was actually calculating ArcCos) :/
• Invert operator for flipping geometry side (e.g. if you want the inside of extruded shape)
• Complex collision mesh generation support (material flag)
• Fix incorrect slider default for RotateVDeg input
• Allow project to force use of instanced rendering, and allow per-mesh use of instanced rendering
• General Unreal 5.1 build compatibility fixes
• Remove use of RerunConstructionScripts in non-editor builds
• Fix blueprint placement in cooked builds (persist BP generated class, not the blueprint itself)
• For custom builds that support it we can fix UV distortion issues on long/thin polys by switching UPMC to high precision UVs
• Translate/Rotate/Scale/Move geometry operators now transform placed objects too
• Copy operator (same semantics as Move, but copies, including objects)
• Performance optims: Disable overlap update during component creation/setup. Don't create proc geom/collision components if not needed (also warning spam)
• Standalone startup crash fix
• Entity optimisations: All rebuilds now deferred to properly coalesce build requests
• Entity improvements: ProcMeshComponent for geometry and collision only created if needed (WIP)
• List opertors: Reverse, and path (Vector3 list) length
• Vector normalise operator
• Allow instanced meshes to affect navigation
• Standalone cook fixes

EXPERIMENTAL/WORK IN PROGRESS:

• Image operators (can be used to modify bulk frame operations and other gen operators)
• Spline/path/shape composition operators (line/point, arc, ellipse, rect, bezier)
• Loft operator (basic geometry from shape moved along path)
• Height Map operator to apply image value as mesh vertex offsets
• Warp frames - Map frames from XY to two paths
• New bulk frame operators: Grid, Resolve, Place, Offset, Turn, Resize, Cull.
• New 'frame on a path' operator
• Polygon vertex validation checks (inf/nan/den checked for and fail poly op)
• Data operator file slots (to read multiple sources simultaneously)
• Noise warp affects objects too

Note: There is no 1.2.5 version, it was used for an internal milestone only.