Posted by philjord on Feb 01, 2020; 9:33pm
URL: https://forum.jogamp.org/8-pass-accumulation-Anti-Aliasing-tp4040265p4040317.html

This issue was solved by Emanuel Puyberet some time ago as a final update to the 1.6.0 version of Java3D.

It was done after the branch to the new 1.7.0 version along with several other updates. Each was taken across to 1.7.0 individually but unfortunately this particluar fix was missed.

So it has been merged into the dev1.7.1 branch of JAva3D 1.7 here:
https://github.com/philjord/java3d-core/commit/239b497e3c012bfee176192cd344bbeb0c3cf192

So if you pull that code branch you can use as many passes as you need to by way of the j3d.numSamples property.

(I've added this reply only to allow others to find this fix, as I'm sure you've already got it and moved on)