The door will flip direction depending on which side of the central line of the wall you approach it from. So if you approach the wall with the door from the left it will be one way around, and from the right it will be the other way around. Hover a door over a wall, moving from one side of it to the other and you will see the flip in action.

Several things here.

There was nothing on the WALLS sheet to stop the light going outside the cave, so I copied the floor to the WALLS sheet and gave the polygon a line width of 1ft to make it a wall rather than a floor.

The WALLS sheet had to be below the LIGHTS sheet, so that it was part of the lit scene and could stop the light coming out of the cave. I moved it up the list to make this true. Unfortunately, I don't know where your entrance is, so you will need to cut one out of the wall or redraw the wall.

The effects were set up ok, but the column was on the LIGHTS sheet, and not the SYMBOLS TALL sheet. That's why it wasn't casting any shadow.

I may have tweaked other things while I was messing around getting it to work, but I tried not to.

You now have a new problem I'm not sure how to cure. The lights are casting rays in the shadows. I think @Monsen might be able to help you with that one. Here is the FCW I produced from yours.

Have you looked at the Options tab in the Save as... dialog?

Here is what you get when you click it (my personal settings shown here for an automatic 3000 px on the long side export cropped automatically to the MAP BORDER)

These particular settings mean you only have to export a simple straightforward image file without fussing about picking any corners, as long as your MAP BORDER layer has the right boundary on it.

Ok. It looks like you've been having some fun with the World Settings.

Open the World settings and the Selection tab. Pick the Default, and click Load, then Apply. You should see the default world appear right before your eyes.

Altitude colours can be similarly set back to default by opening the Lighting and Colour dialog and doing the same thing there. (You won't necessarily have all the same settings as me in either of these dialogs, since many of these are my own home-made settings, but you will always have the defaults and the standard alternative settings)

Remember that in both cases you must first click Load, before you hit Apply.

If you want to change the way things are I recommend playing with only one thing at once on the World Settings Primary tab and clicking Apply each time you change something. That way you will get used to the feel of what everything does.

Then if you get into a tangle with it again you know how to get back to where you were.

Once you have the settings just right I would save them, but to do that you must have opened FT3 by right clicking the icon and picking Run as administrator, or you won't have authorisation to save the new settings.

Three more seals done - some of the Celtic knots.

The Horned Triskelion is often attributed to the Celts, but it was used thousands of years before that in the stone age. Modern interpretations usually depict legs instead of coiled horns.

(As you can see I'm still working on the tree of life, but when that is done the Celtic/Pagan subset will be complete for now)