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Forward renderer fails to render objects front to back and fails to batch when using a replacement shader

Graphics - General


How to reproduce:
1. Download attached project file and open "Main" scene
2. Open the Frame Debugger
3. Notice all jobs correctly batch the cubes together but the ReplacementPass.Job.
4. Notice the order in which the cubes are rendered in the ReplacementPass.Job

Actual result: When using a replacement shader, including Unity's built-in ones like the one used to render the DepthNormals texture,
the order in which objects are renderer does not follow the front-to-back logic and the dynamic batching does not work.

Expected result: I believe a replacement shader should not disable batching and should follow the camera logic for ordering. On mobile devices especially, dynamic batching can save a lot of performances and in our tests, the increased draw call count was the main reason the performance was dropping when using some post-process effects.

Reproduced with: 5.6.3p3, 2017.1.1f1, 2017.2.0b11, 2017.3.0a7

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