Fantastic painting today! I was really impressed with all of the paintings. It is always fun for me as a teacher to see how different each painting can be even when we are all working from the same source image.
In my demo I spent more time developing the transparent bottle. It can be difficult to see the subtle highlights and shadows on the transparent glass but they are there. Sometimes when I am having a hard time seeing the highlights and shadows I try to identify the light source and follow light logic to determine where those subtle highlights should be. This often helps me to see them.
In this case there is a general highlight at the top of the bottle at the base of the neck. There are some smaller areas where the glass is partially reflecting the environment and the inconsistencies in the glass surface that alter the background color you see behind the glass. Before you indulge in those final bright "specular" highlights you need to find these more subtle and general shifts in value and color. They add variety and more believable irregularities in the glass surface.
Once I painted some of those subtle highlights I was ready to finish with the little and lightest highlights. If you have had self control up to this point and not painted in those fun little light spots this can be a very satisfying moment.
I also talked a bit about the reflective bowl. Transparency and reflection are similar in many ways. We suggest both by using the colors of the other elements in our scene.
** CHECK BACK LATER IN THE WEEK TO VOTE ON THE IMAGE FOR OUR FINAL PAINTING **