I've taken some stock photography of lots of clear bottles, and now want to remove the background (which is white-ish, because at a pinch I could leave it...) so that the bottle becomes transparent with highlighting.
My bottles are clear with different colored liquids with multiple refraction and reflection surfaces. I am looking for a background color subtraction effect that will allow me to get to transparent (hopefully with some sort of effect/opacity slider).
Ideas that I can't pull off yet:
- Combine layer with a color fill layer (keyed off the "transparent color") in some manner to produce some output that could be used as the starting point of a layer mask
- Same layer combination as above, but somehow translating "pure white" to transparency.
Notes for what doesn't work (Photoshop terminology):
- "Color Range" and delete (fuzzy select, but not graded/alpha) - results in harsh lines and only leaves the pure white and dark highlights and shadow refractions/reflections
- Magic wand selections for the same reason
- "Background Eraser" because although it is able to only subtract a certain color and leave "the rest", it (like all tolerance based tools) eventually hits a colour slightly outside of the range that it just won't touch.
I'll add more if I can remember what I've found