Sand Dunes

[Criss]

This is a nice example of wind erosion that shapes dune terrains. A filter for creating dunes such as these would someday be very nice.

Uni-directional inverse deep fluvial erosion over a hill terrain?

http://maps.google.com/maps?ie=UTF8&oe=UTF-8&hl=en&q=&ll=28.621898,40.421963&spn=0.111657,0.160675&t=k&z=13&om=1

http://maps.google.com/maps?ie=UTF8&oe=UTF-8&hl=en&q=&ll=27.802791,41.128693&spn=0.112517,0.160675&t=k&z=13&om=1

http://maps.google.com/maps?ie=UTF8&oe=UTF-8&hl=en&q=&ll=28.901345,41.676292&spn=0.111358,0.160675&t=k&z=13&om=1

[cajomi]

Yes, that are really good examples.
I have also a book, special about dunes, how they develope and so on.

But I am not sure, whether I will have enough time till release, to add a wind erosion.

[Criss]

I thought i might have achieved a single-direction terrain filter pattern at one point using displacement but it was some time ago. I think if i play around with some of the inverse erosions at least i can get a basic idea of the shape even though the patterns may be going in all directions.

[cajomi]

I will definitly add displacement filters, which will work on selections, before the final release. I think, they should be able to produce dune like effects.

[Criss]

We will be looking forward to seeing the capabilities of displacement filters. :)

[monks]

Wow, nice find! I've been hankering after some images like that but of hills- I'd really like to see just what they look like in structure from above. If you find any Criss, post 'em :)

monks

[Criss]

Here you go!

Rigid Hills-
http://maps.google.com/maps?ie=UTF8&oe=UTF-8&hl=en&q=&t=k&om=1&ll=33.924631,-117.062845&spn=0.052774,0.080338&z=14

Softer Hills-
http://maps.google.com/maps?ie=UTF8&oe=UTF-8&hl=en&q=&t=k&om=1&ll=33.90832,-117.702713&spn=0.052784,0.080338&z=14

Great Plain Hills-
http://maps.google.com/maps?ie=UTF8&oe=UTF-8&hl=en&q=&t=k&om=1&ll=42.344335,-99.327393&spn=0.188031,0.32135&z=12

[monks]

The third one is how I imagined hills to look like. The hills I'm used to seeing in Britain are most often heavily eroded- ground down. That's why I choose the Soft Rocks: rounded tops in the Filter Settings for hills- or pleasant rolling hills (rather than the more hard type). I was wondering whether those soft kind of hills might be organised in a more structured way- hill bumps following branch like arrangement. It doesn't look like they are in that area at least- in fact zooming out they look like cloud formations or ripples in sand rather than dendritic.

monks

[Criss]

I did not have more time to get the hills you speak of but now i am very curious to see those softer heavily eroded hills. :)

The two top ones is what i see in my area in live in which is effected by a lot of fault movement and very little fluvial erosion because we get little rain out here.

It is very fascinating on how many pattern types there really are for hills alone.

[Criss]

Might this be more of what you speak of?

http://maps.google.com/maps?ie=UTF8&oe=UTF-8&hl=en&q=&t=k&om=1&ll=53.522962,-1.887932&spn=0.075621,0.160675&z=13

[monks]

Hey, they're mountains to us Englishmen- not hills! :) Believe it or not, they're the highest mountains in England- the Pennines. Of course they are immensely old and worn. Manchester is where I live and I recently took some pics of Saddleworth Moor (on the west side of the Pennines on that map). I hope to get up there again when summer comes. There are a few textures uploaded here:
http://www.texturesource.org/forum/index.php?PHPSESSID=6793c2f5edee89a6aa6a224f356fad 62;www

They're the sort of hills that I'm talking about, because when I'm terraining I don't really think of the Pennines as mountains myself eithera as a frame of reference- - more like granite uplands/ moorlands. They are incredibly beautiful- so old and brooding.
When I think of rolling hills I guess I'm thinking of the South Downs in England.

monks

[Criss]

Its lovely, i like all the green there. Where i live it is way to arid and dry for me.

I try to go walking up the hills when ever i can but the closest one is a good three miles from me and where i live is nothing but urban land and houses as far as the eye can see. Some days where there is less smog it can be good to get photos.

These South Downs?

http://maps.google.com/maps?f=q&hl=en&q=South+Downs,+Redruth,+Cornwall+TR15,+United+King dom&sll=53.522962,-1.887932&sspn=0.075621,0.160675&ie=UTF8&cd=2&ll=50.181295,-5.252495&spn=0.081454,0.160675&t=k&z=13&iwloc=addr&om=1

[monks]

Its lovely, i like all the green there. Where i live it is way to arid and dry for me.

Yeah, the mositure tends to make things look more muted and darker. The old Celtic mists...:)

I try to go walking up the hills when ever i can but the closest one is a good three miles from me and where i live is nothing but urban land and houses as far as the eye can see. Some days where there is less smog it can be good to get photos.

Hehe- sounds like Manc. I still think photos are the best (most convincing) texture sources for the time being- though it's inevitable that procedurals will take over sooner or later. Doing terrain modelling always makes you look that bit more closely at nature I find- but I've always loved nature.

These South Downs?

http://maps.google.com/maps?f=q&hl=e...oc=addr &om=1

I was thinking more of the chalk downs Berkshire way I think- but that place doesn't seem a million miles away in terms of look and feel. There's a pic here:

http://www.me-dem.org/images/stories/ArticleImages/Article8GeologyofMiddleEarth/19terracettessouthdowns.png

monks