Comparison

In fact, given how wildly out the colours I originally blocked in the blue bits were with it's not looking too bad now. The left wall was dreadful at first, as I'd got the colour and the approach for the underpainting wrong, and it's taken a fair bit of reworking to rescue it - just need to adjust it's shape now and do the final texture and shading. The acrylics paint over earlier coats nicely as I thought they would - and I think the wash for the shadow on the pavement may well be possible - thinned some of the paint for shading the green part.

Overall, fairly pleased with progress so far.

Done