Happy Birthday and Silk Flowers - Focus stacked - C&C

[BrentC]

First time using a black back drop. Also decided to focus stack. Just found some stuff around the house, wish I had some real flowers. I had a hard time post editing the two with the black backdrop. Any tips for these kind of shots?

1. 25 images stacked
White Silk Flower 2 by Brent Cameron, on Flickr

2. 25 images stacked
White Silk Flowers by Brent Cameron, on Flickr

3. Thought it would look better with with white background - 40 images stacked
HB Vignette by Brent Cameron, on Flickr