dan'z Test

[romullus]

Try Hugin. It does everything ptgui do, but without watermark, because it's free.

[danielmn]

thanks romullus ,  I couldnt get that to work for me.  So instead, I did what I should of done all along.

Mad a inverted sphere in max, put a cam in the middle and take a render.

attached is the the orignal spherical and new the  backplate taken from 3d max

[danielmn]

and here is a test with some random objects and material


thx to hdri haven for the orginal HDRI

[romullus]

You don't have to extract backplate for that. Just put HDRI panorama into enviroment and render - it will be exactly the same, just more flexible and convenient :]

Anyway, here's tutorial how to get rectilinear projection out of equirectangular: https://panospace.wordpress.com/2008/03/18/edit-the-nadir/ You just have to enter different numbers into numerical transformation window to get backplate you want.

[danielmn]

Hey rommullus, thx for the help.
Yeah that should work, seems obvious now.  Just been awhile since I was doing photo integration stuff  (which is exactly why I started )   thx again.