[Yuriy Gapon]

Thanks,Dan.A pseudoeffect would be absolutely OK for the time being,as I`m only creating a camera rig and I found a great tut on that here:
https://library.creativecow.net/articles/toula_jesse/AE-Pseudo-Effects/video-tutorial

Moreover,I even created the control I need here:
https://www.batchframe.com/custom_controls/

and copied the code,so it should work just fine:

Then I called it like so:
app.project.activeItem.layer(1).effect.addProperty(“Dolly XYZ Rotation”);

but it gives me an error:
“After Effects Error: Can not add a property with name “Dolly XYZ Rotation” To this Property Group“.
Do you have an idea what`s wrong,Dan?

[Yuriy Gapon]

Thanks,Dan. Do you know what language AE effects are created in,by any chance? Because in the effects there`re different combinations of whatever the programmer needs,without any restrictions of the AE scripting,it seems.

[Yuriy Gapon]

Thanks a lot.

[Yuriy Gapon]

Thanks a lot.