Thanks! Had a look at that, and made sure that all faces are glass. I've got sunlight passing through now, but there are a couple of problems with reflections (all glass is modelled as a thickness rather than a single plane):
- The balcony at the front reflects as a white strip, which I haven't been able to figure out.
- When I add a refraction layer, there are some weird reflections going on in the central glazed box. There's a big dark patch at the back, and the tree and furniture don't seem to reflect at all.
Any suggestions very gratefully received...
Imogen