depth of field oddity, is this a bug?

[jwwalker]

In the gltf_viewer sample, if you turn on DoF and then move the focus distance way down, say 0.23 and below, then the object looks not only blurry but larger. Would that be considered a bug, or is it just a case where you can't be perfectly accurate in all edge cases?

[romainguy]

@pixelflinger Is that the "focus distance affects FoV" effect you implemented? (as in real cameras). It might also just be an "illusion" because of the intense blur radius.

[pixelflinger]

Ah yes, it's because I implemented the "effective focal length" in gltf-viewer. It's not something filament does, it's just something gltf-viewer does. It emulates (certain) real cameras. Maybe that should be an option, or we should just turn it off.