Underpainting

So my new painting, as yet untitled, has finally got underway. I have blocked in with Acrylic (Raw Umber and white) a basic underlayer. I forced myself to use a larger brush than usual, so I dont 'fiddle' . I am hoping to learn from this painting, I usually tend to finish each part as I go, using a tiny brush, over blending and fiddling which has proved to be a bit of a downfall, so I am hoping to build this one up as a whole and try to be a bit looser. I am looking forward to the challenge!

This is 30 x 24" and will be oil on canvas.

This is a rough stage, the detail comes last!