Image hotspots in Godot 4 with tack.

We&rsquo;re going to build a small interactive scene in Godot 4 around a pixel-art steam locomotive. Click the brass whistle and it toots. Click the cab door and a friendly engineer appears. Click the smokestack and pixel smoke drifts up out of the funnel. The point of the exercise isn&rsquo;t really the train. It&rsquo;s a working pattern for defining clickable regions visually, exporting them as…