That is usually how it works. My quote for this stuff is always: "Fiddle with it until it works or you break it."

Yea, we already do that. But the problem is that Construct stalls the ability to go to other layouts until all of the images are loaded, which takes a while for our client, and occasionally dies mid-load.

So, our live client is around 120Mb of images and data being loaded between the various layouts.

In the HTML5 published version, we have run into issues with C2 loading the page completely the first time a user visits the game client page. Is there a property or something that will give me feedback on the status of the images being downloaded, so that I can display a message to the user to wait (or tell if it has failed client-side)?

You don't. That would be a violation of security in JavaScript. How would you like it if any website that you visited could save files on your computer?

What you might try doing is putting a thin sprite on each side of the screen just outside of the screen area, then just assign "Solid" to all of the boundaries, and 8-direction to all of the UI pieces.

We are also building an MMORTS right now. See the siggy.

Infinite recursion is a terrible thing to behold.

Why not use a for loop?

Instead of a "while" loop, you can use a for loop from 0 to Array.Width-1.

If I have to guess, you probably have competing global events (not subsidiary to any other events) that are competing. They will trigger at the same time when they are both true and will cause... unexpected things to happen. Make sure all of your conditions are predicated on something specific so that you prevent things from executing wildly.

Can you use Pode's iFrame?

Why not just set it to: round(random(100))?

I would look at the "Lighting Demo" in Construct. It is probably not exactly what you need, but I think this will set you down the correct path.