Canyon Construction

[Henry Blewer]

Here is a group of tgd's for making a canyon world. They are step by step.

I'm writing a tutorial on how I do this. (It may take a while to finish) I made these up for Amenbrick to look through.

[Amenbrick]

And will look at with anticipation and gratitude, when I am next at home.

[MGebhart]

You did it again, Henry.

Very clever layering.

Marc

[Henry Blewer]

I hope that these, in order, make sense. The only thing I do that may be different is the tie in of the color across the layers.

[Marcos Silveira]

An image worths more than a thousand words. Where is It?!?!

[Henry Blewer]

I am still tweaking the final render. I have a render for each stage, when I get the tutorial done, they will be available.

[Henry Blewer]

Link to the last image of the tgd's.

http://forums.planetside.co.uk/index.php?topic=9355.msg99083#msg99083

[Amenbrick]

Ok, had a go at making my own.   Pleased with the results, but was hoping for a levellish top to the... tops.   Can this be done with a scalar that stops growth at a uniform level?  

Sorry for the bother, but it's for a shared world where the surface is a windy wasteland and people live in the (varying sized) cracks.

Edit; I lowered the spike limit on the power fractal v.3 from .5 to .12 and that sort of works.   I'm pressing buttons and pulling other levers.   Let you know if anything else works.

[Henry Blewer]

This is quite good. I don't worry about making the tops 'flat' too much. There are variations in height nearly everywhere.

One way to get flat tops is to use a heightfield. The heightfield adjust vertical operator can be used for this; it can cut off the highest areas.

[Amenbrick]

Where does the adjust vertical operator attach?  I've tried it everywhere, with some wild numbers, and it doesn't seem to change anything...

[Henry Blewer]

In the upper left of the Terrain Tab. Highlight the heightfield and just below the box where he hieghtfield is located is the operators selector button. Just add it from there. Then you can adjust it how you like.

[dandelO]

I think that would be the 'clip vertical' node you're after here. An 'adjust vertical' will make the entire terrain higher/lower, all over, the 'clip vertical' will trim the peaks/valleys to your specified heights.

[Henry Blewer]

You're right. Thanks!

[Amenbrick]

I think that would be the 'clip vertical' node you're after here. An 'adjust vertical' will make the entire terrain higher/lower, all over, the 'clip vertical' will trim the peaks/valleys to your specified heights.

Didn't seem to do anything, regardless of being set at -1000, 1000 and a couple of points in between.   

[domdib]

Amenbrick, you are aware that the heightfield operators only work on heightfields, not on procedurals (Fractal Terrain and Alpine)? If you want to generate a heightfield from a procedural, see here: http://forums.planetside.co.uk/index.php?topic=9319.0