Hello Axel
I don't know what sort of Robe fixture you mean.
But generally you can edit the channel values in the 3D.
If you load a fixture within grandMA 3D you can edit the fixture properties comfortable within the user interface. There you see the meanings of the values:
- Load the fixture inside granMA 3D
- open the object tree on the right side
- select the fixture
- select 'Edit Fixture Type'
There you have to set the strobe values to the right numbers.
you can take a similar fixture that works e.g. a Clay Paky type as example.
Hope that helps
Otto