How it’s done: Starting with a sunflower photo with a nice plain sky background I used the select by colour tool to select the background. Then by promoting the background layer to a proper layer I cut out the sky to leave the sunflower on the transparent checkerboard. On the first go with Mathmap I found the petals still had bright edges because they used to be against a bright sky, which looked wrong against the dark flower centre. So I went back so the selection stage, grew the selection by 3 pixels so it cut off the edges of the petals and then feathered it by 3 pixels. Then I cut the sky off. Now I had just the flower with gradual transparency around the edge. I grabbed a nice brown from the middle of the flower using the eyedropper and created a new layer under the flower layer filled with that colour. Then I flattened and again cut out the flower from the background using fuzzy select this time. Now at last I had a flower with a brown fringe around the edge.
Finally I stuck it in Mathmap, selected Droste and turned on ExternalTransparency because that’s what it has. Tweaked the parameters and here is the result.
Parameters: InnerRadius 29.56 OuterRadius 91 Periodicity 1.02 Strands 1 XCenterShift 2 YCenterShift -4 StartingLevel 5 ExternalTransparency on
|Model||Canon EOS 300D DIGITAL|
|Exposure||0.008 sec (1/125)|
|Date and Time (Original)||2006:09:05 15:07:40|
|Exposure Bias||-2 EV|
|Focal Length||31 mm|
|Lens Type||Unknown (-1)|