After changing the black background to turquoise, I felt it was too close to the colour of the snake.
I tried modelling the shape of it more. As its an imaginary picture I didn’t use any reference images, so I’m not sure if the scales look OK. The ladder seems to work.
So I finally chose a dark red to contrast with the snake and to try and make it stand out more. The last photo is a bit blurred as it was taken on my phone. I have now entered it for a local Open exhibition. I will be surprised if it gets in, I guess its a bit unique for an open show, we will see!