Hello,
Why do you export a bitmap picture ?
You can export light and vectorial views by 3D documents into Archicad.
By this way you pdf will be perfect !
Christophe - FRANCEArchicad Designer and Teacher
Archicad 15 to 27 FRA FULL
OS 11.6 Big Sur - MacBook Pro 2017 - 16Go RAM
"Quality is never an accident ; it's always the result of an intelligent effort" John Ruskin