Hello,

seems to me there's some grave problems with subdivision surfaces in the latest build.

New scene, drop down a box and a spotlight, tick ‘render polygons as subdivision surfaces’

9.1.155: a nice ball
9.1.156: nothing

eetu.

Yes, build 9.1.156 has a problem with rendering subdivisions and volumes (they will not show up in the render at all). This will be fixed in 9.1.157 - if you're rendering these types of primitives you should avoid 9.1.156.

Andrew