Okay, so here's how far I've got with the poor ole doggie, waiting for his master, the Lord of the Castle, to come home. Thanks to Menno for the fire in the torches. Thanks to Dann-0 for pointing out that the negative light should be positioned UNDER the doggie. I now - finally! - have a shadow under the doggie, but I now see some... changes in the lights/shadows, where various light cast from various sources crosses. Does it look okay? (I had to use spotlights as with the negative lights under the dog, the whole doggie went dark, so I used spots to re-light his back where the light from the torches SHOULD have lit him up and weren't doing so sufficiently - if I increased the intensity of the torchlight it looked too bright on the stonework.) Oh, I've also increased the frequency of the stonework inside the arch. So, how does the image look now?