stair effect in my heighmap

08-23-2016 12:42 AM
New Contributor

Hi every one,

I'll try to quickly explain what I did with CityEngine* :
I simply draw a road network on my imported heighmap [the original resolution is 4097X4097 pixels, format 16 bits .PNG] .
In my project I well fixed the same resolution in the heighmap settings.
After snapping [Align terrain to shape] the terrain to the road I export the modification using "Export selected terrain as image" > format: 16 bits .PNG.

but when I import it in my 3D engine I obtained "stair effect" everywhere , as if the resolution or format were degraded.

what am I doing wrong?

Best regards!

* Esri CityEngine 2016.0.2642

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1 Reply
Esri Regular Contributor

Thank you for your question. There seems to be quite an offset between the terrain and the road network.

Aligning the the terrain to the road network creates a ridge around it. To avoid the stair effect you could use a higher lateral resolution heightmap, but the steep drop would still be there. The 16bit height resolution is not the problem here.

So I suggest to either first

  1. add a global elevation offset to the terrain to make it match the roads
  2. or do a [Graph > Align graph to terrain ] step

and then do the [Align terrain to shape]

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