Old Stuff, New Tricks
Well yes, there are commercial light diffusers available to buy, but there are some pretty ingenious homemade solutions, as well. So this morning, I cut the bottom out of a juice jug, and set it up next to a window, with a goose neck lamp sitting next to the jug. Then I set a small point-and-shoot camera lens down into the neck of the jug. Details are here. Thanks Camera Jim! I had to add to the jug's height to allow the camera to focus, and a measured length of paper towel tube did the trick.
I'm pleased with the results, and I'm going to try it again, and see where this can take me.