Thanks, guys, with all the info you guys provided I realize what I was doing wrong. I was trying to export the model data as a .PNG etc, when I should have rendered it and then saved as such. And when I was running the viewcapturetofile command, I was overlooking the with no background button, so I kept getting the bg.
Now that I have it all sorted I understand, I can run viewcapture, and save it as is with no bg, or I can run the render command and tweak it some more if I want, then save it out.
So to recap, when I’m working on the model and I want to export the model-data out to another program eg, sketch up, it exports the data, so it can be manipulated.
When I want to work on something in a 2D program, eg, Affinity, I render or viewcapture, and save as .png etc.
For something so simple once I understand it, it’s been kicking my butt for 2 days.
so again, all the help is much appreciated.