Photo by Sally Hayman
This market scene resolves nicely into just a few shapes. There's a strip of dark along the top (the awning), with a strip of middle value rectangles (the doors) below that. Then there's a strip of dark below that (the shadow), and a strip of light below the dark (the fruit). Finally, there's a triangle along the bottom made of a mix of all three values. Five shapes.
It would be nice if you could paint everything light, then put the middle values on top of the light and the darks on top of the lights and the middles. Can you see a way to do that?
Imagine wetting the paper first, then blocking in lights everywhere. The fruit could be a cloud of light yellow and red. It wouldn't matter if it bled a little into the triangular shape below, since the strong darks in that area will give sharp definition later to the bottom edge of the fruit. And it would be good if the red and yellow bled into the shadow area, since there are fruits in the shadow area, too.
The strip of middle value doors could all be painted a color like the warm neutral you can see right behind the post in the center. I'd put some other neutralized middle value colors in while that wash is still wet. You can run those middle values right up to the top of the page. Later, you could add some slightly darker verticals in that area to show that there are various rectangular doors. Soft edges or hard? I think it could be either or both. I wouldn't make them as dark as the shadow section that comes last. That would make the background come forward. The dark awning along the top, if you decide to include it, could go down right on top of the middle values after they're dry.
Finally, the big shadow. Use your practice paper to get the value dark enough so you don't have to go back over the shadow again. If the fruits don't show through the shadow glaze well enough, add some red, yellow and green into the shadow while it's still wet. Make sure the paint on your brush is pretty thick for this job to prevent blooms, but If a bloom occurs, leave it.
How much information does the painting need before it's done? That's up to the individual painter, of course, but be respectful of your alter ego, the viewer. Leave a little for them to interpret.
It may be a good idea to read this again before launching into a painting. A monochrome value study would also be very helpful.
Here are a couple more images that resolve well into light, middle and dark layers to choose from.