A few years ago I purchased a set of clear glass ornaments during the after Christmas sales intending to 'do' something with them for the next year. Well that never happened. The box of ornaments was packed away and forgotten, until we did a whole attic clean up.
The box of glass ornaments resurfaced just as I was trying to decide what to bring as a gift to our Trout Unlimited chapter's Holiday gathering. I had been thinking of doing a trout painting for the Chapter's spring auction, and so had already massed reference materials on my desk. I had three colors of glass paint and a black glass marker to work with. Maybe I could paint a trout on the glass.
Where to start? I measured the circumference of the glass ornament. Then I made three appropratily sized pencil drawings of Brook, Brown and Rainbow Trout. Now I had my reference sketches.
For some reason, I decided to try painting on the inside of the ornament instead of the outside. This is known as reverse painting, painting from foreground to the background. That didn't sound so hard. I traced the drawings onto strips of tracing paper. Then taped the paper to the outside of the ornament. I used the red, blue and yellow paint to mix appropriate fish shades. So far so good. Now to paint.
You can compare the two in the image painted from the same reference sketches below.