What I am finding about some of the colours that I am using in this painting, is that they become 'grainy' when dry on the textured paper. I like the texture of the paper, but the 'graininess' makes it less 'crisp', which I think is why I am not as happy with the light effect in the work.  I have darkened a few shadows, which increases the contrast, and I think that this helps. I shall continue tomorrow.