Hi Mick,
If I give you or link to a couple transparent PNG images, could you add a preset to the list in the refraction simulator? I can give you the details (sizes/distances) for scaling.
What I'd like to be able to do is simulate various atmospheric conditions for the scenario in a recent YouTube series I've been doing:
I can sort of make it work using one of the Hillhouse/Habitat presets, but I'd like to be able to change temperature profile up to around 300 ft or even more. (Not so great that I can't make fine tune lapse rates over short spans near the water.)
If you don't have time or just don't want to deal with special requests, no problem. Just thought I'd ask. I have a notion for a YouTube presentation and was thinking I could use your simulator to demonstrate.
Ask me again next week! I'm off to AlienCon this weekend.