Making tunnels

[John-117]

Hello, I am trying to make a tunnel entrance.  As I am newer to Terragen I don't know how I should do this (I have toyed with displacement a lot and got some weird results).  I don't need a whole tunnel just a good entrance that I can place an open blast, hanger or underground base door object over and the camera can see into for a little distance.  Also I am NOT going for the cave look here, it is man made and should sort of look rectangular/circular.  Could someone point me in the right direction, thanks.

Below is an image of what I am aiming for:

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[Henry Blewer]

It's been done. However, it was some time ago. It also is not very easy. I think the best one I have seen was by Inkydigit. You may find something searching his threads.

[John-117]

njeneb Thanks, I'll check it out!

[Jason71]

I would try modeling and shading all the man-made geometrey in another app, and import it as an obj into your terragen scene.  for modeling on the cheap, wings3d or perhaps even sketchup might get the job done.

[John-117]

@Jason71  Thanks, I intend to do the man-made part in another app (Blender, maybe SketchUp).  However, my main problem is the horizontal shaft to put it in (the camera needs to see a little way into the hill/mountain say 10  to 50 meters at furthest).

[Oshyan]

You could try Through Camera projection of an image map of where the hole should go, plugged in to a Displacement Shader, with the Displacement Multiplier down at say negative 50.

- Oshyan

[John-117]

@Oshyan  Thanks, I'll look into this and report back.