3DModel: `z-origin` inconsistent between editor and preview

[ToadLobe]

Problem description

Setting the z-origin of the 3D model to back or front renders the object differently in the editor and in preview. My test indicates that the result is flipped:

Attach a .c3p

Repro.zip

Steps to reproduce

1. Play the project, it will cycle through each z-origin.

Observed result

Flipped results.

Expected result

Not flipped.

More details

Affected browsers/platforms:

First affected release: Reproduced in r480.2.

System details

View details

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