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Support => Terragen Support => Topic started by: j meyer on June 30, 2008, 04:24:36 PM

Title: Negative Displacement Problems
Post by: j meyer on June 30, 2008, 04:24:36 PM
Hi there,
there still seems to be a problem with negative displacement.
I've done only some quick tests,but there are issues with
a) negative values in the heightfield generate -> Feature scale
b)negative displacement values on power fractal shaders
i found no problems with the displacement shader though.
Just for information.
Title: Re: Negative Displacement Problems
Post by: Matt on June 30, 2008, 06:40:54 PM
I was able to reproduce the problem when I ran some tests recently, but haven't fixed it yet. I will look at it again.

Matt
Title: Re: Negative Displacement Problems
Post by: j meyer on July 01, 2008, 09:23:38 AM
Thanks for the quick reply. :)
Title: Re: Negative Displacement Problems
Post by: Pyronious on January 07, 2009, 06:59:15 PM
Hey guys,

Any news on getting this fixed?  I have to produce final output renders for a scene I created back when this was working (January 2008).  I don't know how to match the original concept renders that rely on negative displacement in the PowerFractal v3 shader.

Currently using 1.10.23.1 Deep + Animation.
Title: Re: Negative Displacement Problems
Post by: j meyer on January 08, 2009, 10:14:05 AM
In some cases it's possible to use workarounds like connecting
the power fractal to a displacement shader and set that to a
negative value,but that does not work for everything.
Another way can be to use negative values for buoyancy,sometimes
in conjunction with noise variation,or a color adjust shader or a
converting function and most likely there are other ways too.
Anyway,it depends on other settings aswell,so sometimes you can
get it done sometimes not,i'm afraid.
Good luck,J.
Title: Re: Negative Displacement Problems
Post by: Matt on January 08, 2009, 01:38:35 PM
I will make it a priority to fix this and let you know.

Matt
Title: Re: Negative Displacement Problems
Post by: Pyronious on January 08, 2009, 03:12:53 PM
J, thanks and I will experiment with your suggestions. 

Matt, thank you for your assistance.