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Controlling Curvature of Spherical Camera in Iray

johnbuckeridgejohnbuckeridge Posts: 328
in Technical Help (nuts n bolts)

Hi there.  I've been experimenting with fish-eye camera effects, but on the distortion dropdown menu, with 'spherical', you only seem to get one setting - highly curved, with no apparent way to increase or decrease the curvature.  I'm aware of the Small World camera product for Iray - would that offer more control?  I'm reluctant to spend the money if it's been superseded by upgrades to native camera options in later iterations of DAZ Studio.  

Very difficult to find anything useful in the way of online tutorials.  Mister Google suggests various parameter options with use of the 'poly3' from the distortion dropdown, in tandem with K1, K3 and distortion scale, as well as playing about with focal length, etc, but none of these have any effect whatever - well, not in Iray preview, anyway.

What am I missing?

Comments

  • prixatprixat Posts: 1,620

    If I remember correctly, the 'spherical' distortion was for creating your own HDR probes.

  • jmucchiellojmucchiello Posts: 1,267

    poly3 definitely uses k1 and those other setting to change the "depth" of the distortions. I haven't played with that in a long time so I can't be more specific.

  • johnbuckeridgejohnbuckeridge Posts: 328

    prixat said:

    If I remember correctly, the 'spherical' distortion was for creating your own HDR probes.

    That makes a lot of sense - the effect always puts me in mind of those HDRI product promos. 

  • chris-2599934chris-2599934 Posts: 1,926

    A spherical camera is... well... spherical.

    It takes a picture that is 360 degrees in all directions - useful for making HDRIs but not the same as a fisheye lens. There's no way to "increase or decrease the curvature" because if it was any more or les than 360 degrees it wouldn't be spherical.

    To simulate a fisheye lens, start with a normal Daz camera, then in the Parameters tab choose "Camera" and adjust the "Focal Length (mm)" property. For a fisheye lens it should be between 4mm and 16mm (at least, that's what Google tells me, you can experiment).

  • jmucchiellojmucchiello Posts: 1,267

    prixat said:

    If I remember correctly, the 'spherical' distortion was for creating your own HDR probes.

    I had no idea this existed. It changes... well, not everything. But certainly a few things. :)

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