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+--- Thread: Creating heightmap (/Thread-Creating-heightmap)
Creating heightmap - grit - 08-05-2017
When creating heightmap I need that central black areas become sharpened black and central white areas sharpened white. Between black and white areas there shold be a soft grey falloff so that I got smooth transitions.
Gaussian blur does smooth falloff but it dilutes black and white areas into grey.
Is there a way to maintain B & W and get smooth grey falloff in between B & W?
I tried G'MIC varois smooth options but didn't get what I want.
RE: Creating heightmap - rich2005 - 08-05-2017
Hmm...using Gimp 2.9.5
You should be able to get something using duplicate layers with a radial gradient applied to a layer mask on the top layer.
Duplicate the layer, add a layer mask and adjust the top layer to sharpness you need, this using color curves
![[Image: 9UjqltP.jpg]](http://i.imgur.com/9UjqltP.jpg)
Then click in the layer mask to make active and apply a radial white to black gradient (blend tool) With Gimp 2.9.5 you get a real time view adjusting the start and end points of the gradient and also the offset slider. Hit the enter key to finalise.
![[Image: KF6NYM5.jpg]](http://i.imgur.com/KF6NYM5.jpg)
gives something like this http://i.imgur.com/etWGEFk.jpg A 'new from visible at this stage is usually a good idea.
RE: Creating heightmap - grit - 08-05-2017
Thanks.
In 2.95 layer mask does not work. In 2.8 works.
RE: Creating heightmap - rich2005 - 08-06-2017
(08-05-2017, 08:40 PM)grit Wrote: Thanks.
In 2.95 layer mask does not work. In 2.8 works.
If it truly does not work, then that is a bug, that should be reported to Partha.
I think that it does work and maybe you forgot about setting the offset, the default in Gimp 2.9.5 is zero
Check this demo https://youtu.be/mTuEmzLEUrY against your procedure - duration 2 mins
RE: Creating heightmap - grit - 08-06-2017
(08-05-2017, 07:22 PM)rich2005 Wrote:
What filter render settings did you use for this initial map ?