How can I overlay a road on a multi-res cube scene?

<image type="CUBE" multires="true" baseindex="0" tilesize="512" devices="!androidstock|webgl">
	<level tiledimagewidth="8192" tiledimageheight="8192">
		<front url="/panos/73/0/3/%v_%u.jpg"/>
		<right url="/panos/73/1/3/%v_%u.jpg"/>
		<back url="/panos/73/2/3/%v_%u.jpg"/>
		<left url="/panos/73/3/3/%v_%u.jpg"/>
		<up url="/panos/73/4/3/%v_%u.jpg"/>
		<down url="/panos/73/5/3/%v_%u.jpg"/>
	</level>
	....
</image/>

I have a multires cube scene with a beautiful view of a trail. What I want to achieve is to overlay a line-drawing of the trails itself which I can toggle on and off. Any idea on how I can achieve this? Thanks in advance!

This is want I want to achieve.

Just to clarify. The line does not have to be dashed or white.

San7 Are there tools to help drawing those lines? Thanks for replying!

Is it possible to draw curved lines? Like this:

Thanks for all the really good answers!

So I've created a transparent .png version with only the road I want to overlay the scene. The .png is same dimensions as the stitched image (pre-tiled). But I struggle to project it correctly onto the world.

I've played around with hotspot.ath, atv and depth. Based on those I can get it quite close, but still not properly.

I'm struggling to wrap my head around this since I do not come from a 3D or 360 background. I tried to follow the tutorial you linked Klaus , but also very confusing without any prior knowledge.

Am I on the right path or am I attacking this the wrong way?

Without any depth

With depth = 5000

For everyone else that are looking for a solution regarding this problem.

We used ToolBox V2 (ToolBox V2) to create polygonal hotspots and set the fillalpha to 0. That way we got good enough results that are correct placed in the world. And since they are on a separate layer we can also toggle it as we wish.