I looked at the dried fixed pastel image against a white wall, trying to decide whether it changed the drawing’s effect.
The wall isn’t reflective enough. I can’t really see much light coming through. So I try it taped to a window.
Then the sun came out:
I really like the grainy uneven quality that comes out when light is behind this image. Without the light it is much flatter. On a wall, or my drawing board, all you can see is the pastel powder, so the drawing is dense and velvety, but flat.
Then I tried the same image, but in watercolour paint on the tracing paper.
