Light at end of tunnel effect?

I want to create a shader I can apply to a flat plane that will give off the effect of a light at the end of a tunnel, where moving from side to side will create the illusion of the plane having depth. I'm fairly certain I need to use depth to achieve this effect, but I have never used depth before in shaders so I'm not sure what to do. Some help would be appreciated, thanks.

 

You can use some post effect like bloom or god rays.
Put a quad with unlit shader on the end of tunnel and assign hdr color in material.

 

This is what I tried at first, but it did not give off the illusion of depth I'm hoping to get.

 

Share some screenshots with what you get so far, and some references what you want to achieve.

 

Did this in photoshop as a quick example of the sort of effect I want, which is to create the illusion of a tunnel on a flat plane.

 

Depending on how complicated you want to get with this, you can use a basic box projection like an interior mapping shader uses.

See the SimCity 5 example I posted here:
https://forum.unity.com/threads/interior-mapping.424676/#post-2751518

Beyond that you're getting into slightly more complex raytracing / raymarching setups to get the curved top. See these two examples from ShaderToy:
https://www.shadertoy.com/view/Ms2SWW
https://www.shadertoy.com/view/ltXGW4

Basically you'd have to figure out a way to merge those two shaders (a not entirely trivial task) so the top half is an arch, and the bottom is the box.