Like Djordje says, you have to create the symbol fill. (the software is suppose to ??? integrate with Archicad, but I was never able to make it work- you'd think it would save an .aat file?).
1) Save the hatch as a DWG/dxf.
2)Place the DWG in AC (1 drawing unit = 1 inch), then "Explode drawing into current view" (Just save the Primitives). Or xref it in.
3) Select all the lines. > Edit> COPY
4)Open "Fill Types", Select "new", symbol fill
5) Under edit Vectorial Pattern> PASTE
That work?
EDIT:
Read the attached. .....and there is an .aat file in the BonusGoodies folder.
Confused? I am.
Marc Corney, Architect
Red Canoe Architecture, P. A.
Mac OS 10.15.7 (Catalina) //// Mac OS 14.5 (Sonoma)
Processor: 3.6 GHz 8-Core Intel Core i9 //// Apple M2 Max
Memory: 48 GB 2667 MHz DDR4 //// 32 GB
Graphics: Radeon Pro 580X 8GB //// 12C CPU, 30C GPU
ArchiCAD 25 (5010 USA Full) //// ArchiCAD 27 (4030 USA Full)