I followed along with one of Lachri Fine Art's live streams to paint these grapes. Using a combination of glazes and opaque layers, I achieved the frosty look you see. After going over the background with titanium white, I painted a couple layers of red, let them dry, and glazed a thin layer of yellow over it. During the live stream, Lisa reminded us to pretend we'd had too much coffee when doing the beige highlights on some of the grapes. This translates to "wiggle your wrist like crazy". Indeed to paint many of the dots and squiggles of red and pale purple, I did this, while holding my brush at the very end of the handle. Holding the brush in this way meant I had absolutely no control over my strokes, which was exactly what I needed.
After working on this painting for a while, it became clear to me that much of the glow in the grapes came from placing cool, blackish purple against warm red orange. In other words, cool against warm. If your grape is looking glowy enough, you probably need to darken your purple. I ended up putting more layers on my purple areas several times when I thought they were done.
Painter of portraits and wildlife