Adding highlights

It's a good idea to start out with a bit of limited values and work toward the extremes of dark and light as the image progresses. This means staying away from black and white for as long as possible. I don't usually paint with those colors anyway. As it was time to go brighter and add highlights, I did that on a new layer in Linear Dodge blending mode. Instead of white, I used Warm Grey 1 to continue the pinkish hues on the front of the frog. The densest areas may actually become white, but but areas of lighter opacity will brighten underlying colors while still allowing the warmth to show through. All these layers overlaying each other also help to suggest the skin translucency. I'm also thinking about the added elements like the swim trunks and water wings. For these elements, I'm using my traditional method of starting with solid color silhouettes on their own layer. The water wings are the usual orange. For the shorts, I'm thinking about a warm red to keep with the color scheme, which is leaning complementary.