I did a painting of "Lady of the Lake" (Nivian) about ten years ago. First I read her story for ideas. It seemed to me that I had one of two choices, to paint her death (beheaded by a knight) or the classic moment of her presenting Excalibur to King Arthur. I couldn't find where anyone did the former so I gave it a go. Problem was that every idea I came up with it seemed the knight was the main subject and not Nivian. Also, it tended to be a gruesome idea. So I went for latter. Problem with that is so many have painted it and some of them are classics (like N.C.Wyeth) making an original take difficult. But I finally came up with an take on the scene that I could not find others have done (using Google search). Most (including Wyeth) have her arm holding the sword out of the water as Arthur approaches or takes it from her. I decided to use the image as a metaphor for her. In the Arthurian legends she's a rather amoral character, a troublemaker and was a student/lover of Merlin. To show the magical side I have her rising from the water, to show the troublemaker side I have the water at her feet being turbulent and stirring up the flora and fauna of the lake. She'll hold Excalibur and have a look on her face of sorrow as she doesn't want to part with her, showing she has no concern for social hierarchy given it's the king's sword.
Here's the original thumbnail to capture the concept and rough out the composition.
click image for full size
From there I refined it some on tracing paper. First I did the background. Tracing paper is cheap (I buy it by the roll) and can turn it over and look at the other side to check for image distortions.
click image for full size
This was based on a photo composite I threw together in Photoshop.
click image for full size
Photograph of model. Ebay sword prop and had my daughter sow a simple skirt. Model provided the top.
click image for full size
Drew the model on tracing paper.
click image for full size
Consulting with some other artists I decided to add a fantastical element with a serpent rising out of the water with her, along with the planned various plant and animal life native to the UK that live in a lake. Also changed the hair so it flowed on one side, unlike the thumbnail (both sides) and the photo where it hangs straight down. I did an image search for lake creatures and plants and constructed them around her. Unfortunately I can't find the images of those sketches, I must not have scanned them in. Nor do I have a scan of the detailed drawing with all the elements combined together. But here's a shot of me starting the painting, where you can see all the full composition in the beginning stages.
click image for full size
Here's the first phase of the painting. You can see I changed my mind about the sky and decided to do a cloudy sky that was foreshadowing in nature.
click image for full size
I thought it needed more and I did something I rarely do and that was to make major changes a couple of years later. This is the finished painting.
click image for full size
I made a turbulence line in the water, added more dark elements and the geese flying in the background (symbolizing Arthur) and here I felt I had not only a more complete story but a better and more interesting composition.