Is it possible to fake perspective reflections of a HRDi in a scene with an orthographic camera?

As reflection rays are parallel on flat surfaces, every face of a glossy object has a uniform color instead of color variations from the HDRi.

I'd prefer a node-only setup to baking textures. Setting the camera back to perspective and using a high focal length is Plan B.

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    $\begingroup$ Reflections work fine with orthographic cameras, at least on non planar geometry $\endgroup$ – Duarte Farrajota Ramos Jun 5 '18 at 18:48
  • $\begingroup$ obviously, as rays from non planar faces won't be parallel. edited my answer to target falt faces specifically. $\endgroup$ – bstnhnsl Jun 5 '18 at 19:18

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