Recently I’ve been working on a method for creating sand dunes.
The final result achieves the look that I want, but as I have gone over my work; I’ve found the method to be problematic when I try and change the direction of the dunes.
(see galley image 2)
In the project file I’ve duplicated my setup; with the above having the gradient facing another direction.
(see galley image 3)
As you will see, the dunes do not look the same; instead there is an odd bump/lip on their edge.
(see galley image 1)
The gradient and displacement face roughly the same direction in the original; and I’ve kept the same difference in the above.
I’am perplexed as to why this is happening; if you guys could take a look and figure out the solution/answer I’d greatly appreciate it.
(Update: thanks to HYLK for helping me realise & solve the issue )
I think I have miscommunicated the issue; I’m not so much talking about the edges of the extent, but the ends of the dunes themselves (just before they drop off).
I’ve rewritten the post to hopefully make it a bit clearer.
If I however am misunderstanding you, please clarify if you can.
(edit: I discovered via using a displacement device at the end that the effect can be reproduced by mirroring; I tried mirroring the angle of the displacement [e.g. grad=74 degrees/dis=56 -> 236], but that didn’t work, any thoughts?)
Ah I see, that has nothing to do with the edge handling indeed.
I think the issue has nothing to do with the displacement device, but is caused by the gradient device instead. Because you use a discontinuous gradient, the Curves device creates some sharp edges. At certain angles, these edges are more pronounced than others, causing the effect. I suggest increasing the blur’s distance parameter’s value.
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