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General => Terragen Discussion => Topic started by: John-117 on March 17, 2010, 02:43:44 PM

Title: Making tunnels
Post by: John-117 on March 17, 2010, 02:43:44 PM
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:

[attach=#]
Title: Re: Making tunnels
Post by: Henry Blewer on March 17, 2010, 03:19:19 PM
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.
Title: Re: Making tunnels
Post by: John-117 on March 17, 2010, 06:37:47 PM
njeneb Thanks, I'll check it out!
Title: Re: Making tunnels
Post by: Jason71 on March 17, 2010, 07:09:22 PM
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.
Title: Re: Making tunnels
Post by: John-117 on March 17, 2010, 09:12:35 PM
@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).
Title: Re: Making tunnels
Post by: Oshyan on March 17, 2010, 11:56:05 PM
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
Title: Re: Making tunnels
Post by: John-117 on March 18, 2010, 12:52:20 PM
@Oshyan  Thanks, I'll look into this and report back.