JDK-8095058 fixed a bug in the handling of the alpha channel for 3D primitives. This fix went into both 8u60 and 9. This exposed a bug in the PickTest3D toy where it had an incorrect alpha value (was 0.5 and should have been 1.0). The bug was fixed in 8u60 with the following changeset:

http://hg.openjdk.java.net/openjfx/8u-dev/rt/rev/0f52bc27d4bd

However, the changeset was not applied to 9 as it should have. It will be a simple matter of applying the patch to 9-dev.