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Paul,
Try Cropping the image first (approx 100x100 pixels say) around the star in question. Documentation regarding IRIS is not great but this is what I worked out:
X = width of output 3d image (I used 1024)
Y = height of output 3d image (I used 1024)
High = Maximum luminance to display (select a value just above peak luminance of star). Higher luminance will be clipped.
Azimuth, elevation = viewpoint angles.
Step = "binning value" for grid. I selected 1.
False Colors = selected.
If you stuff it up press the undo button on the menu bar. You can only go back one step though, there is no concept in IRIS of "history" like you would expect in most image processing packages.
Oh, if you want pretty colours instead of greyscale press the "Rainbow" button on the Threshold bar. You can go back to normal greyscale if you press the Horizontal Black/White button on the Threshold bar.
There is stuff in IRIS that even Christian Buil seems to have forgotton about!
Terry
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