There was a check for volume bounces at every surface intersection. That could lead to a volume scattered path being terminated when passing through a transparent surface. This check was superfluous, as the volume shader evaluation already checks the number of volume bounces and once it passes the max, volume shaders will not return scatter events any more. Reviewers: #cycles, brecht Reviewed By: #cycles, brecht Subscribers: brecht, #cycles Tags: #cycles Maniphest Tasks: T53914 Differential Revision: https://developer.blender.org/D3024