Reproduction steps:
1. Open project attached(OffsetTest.zip)
2. Open scene "TestScene"
3. Change offset of materials "Mat1" and "Mat2"
4. Rotate camera.

Expected result:
1. When offset is set to 10000, both cubes will be completely green.
2. When Cube1 offset will be -10000 and Cube2 offset will be more than 0, the part of Cube1 will be drawn in Cube2.

Actual result:
1. Only one side of cube is green (depends on camera position).
2. Cubes are drawn separately.

Reproduced on: 5.5.0f3, 5.5.2p2, 5.6.0f1, 2017.1.0a4
Works fine on: 5.4.4p4.
Regression introduced in 5.5.