Is there a cap placed on the tessellation input? Values above 8 don’t seem to tessellate the meshes any further.
Yes indeed, the tessellation factor is limited to 8 for performance reasons.
You can however increase this limit by editing the FlatTessellation.usf and PNTriangles.usf shader files,
[FONT=Courier New]float4 MaxTessFactor = 8.0f; (line 68/86)
That worked. Thanks!