Very cool, though! Happy Sunday, Peter!

Really don';t know, but it is quite amazing.

Can't help, I'm afraid but it's a terrific effect!

I don't know, Peter but the result is a maginficent artistry !!! Blue sky here today ! Hope this is the same in Groby !! Enjoy your Sunday !!

Not sure on the cause but I do think the possibility has something to do with the fact that I had being raining (Puddles visible beyond the steps) maybe a reaction caused by what was the composition of the paving stones and some light effects added. Noticeable a straight cut off line on the last step. If it was the glass I would imagine the whole image would have been effected. Just a guess though. Anyone agree on the above possibility. Nice shot all the same Peter Greetings Tess.

The water must be part of the answer maybe it was algae on the steps, the house is closed for the winter now so I will have to wait until the Spring to try on a dry day, it didn't occur to me to try a different pane of glass

Absolutely fantastic!

I think it has something to do with the filter and the treatment of the stairs, maybe some oily cleaning or treatment liquid. Reminds me of the Diesel artefacts you see sometimes on wet streets, mainly from some machines and a lot less nowadays as things don't leak as much. The filter and the glass might have enhenced it for the camera. I don't think it's only the glass it would be the whole picture then.

For me, I will go with a reflection of the old glass pane (I have some in the house and I noticed that sometimes they work as prisms because of their uneven surface) that your filter picked up. If you look at the puddles in the middle of the gravel circle, they seem to reflect the whitewashed wall of the building, probably above (or rather below?) the window from which you took the shot. The fact that the rainbow like reflection ends sharply where the steps end, I think is due to the fact that the wet steps are a reflective surface, while the gravel is not and by the time you get to the equally reflective puddles, they no longer reflect the window, but only the white wall.
Very interesting as well as beautiful, Peter!

Nee zo zag het niet uit---op de grond was ook niks te zien