Continents?

Started by Pentagular Dark, June 09, 2011, 08:59:37 PM

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Pentagular Dark

The title's sort of descriptive I made a continent map got it just how I wanted it and, displacement doesn't work.

Any Help? ???
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TheBlackHole

Can you upload your continent map?
They just issued a tornado warning and said to stay away from windows. Does that mean I can't use my computer?

Pentagular Dark

Well it's really only black and white but, here it is.[attachimg=#]
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TheBlackHole

In the image map shader, you might want to change the projection from "Through camera" to Spherical and copy your planet's coordinates to the image map shader's center. Seeing as your image map isn't corrected for spherical projection, you'll get pinched landmasses near the poles. TG2's default camera position is near the north pole, move the camera closer to the equator so you don't see the pinched continents.
They just issued a tornado warning and said to stay away from windows. Does that mean I can't use my computer?

Pentagular Dark

Except for the camera thats what I meant by I got it exactly how I wanted it. I'm having troubles with displacement.

EDIT:Corrected for spherical projection you say?
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TheBlackHole

Increase the displacement amplitude.You'll have to go backwards with the camera into space, then zoom in to the side of the planet to see the displacements without getting pinched landmasses. To correct it for spherical projection, the easiest way to do that is to black out the areas around the poles (top and bottom 1/4 of the map).
They just issued a tornado warning and said to stay away from windows. Does that mean I can't use my computer?

FrankB

Quote from: TheBlackHole on June 10, 2011, 10:13:36 PM
Increase the displacement amplitude.You'll have to go backwards with the camera into space, then zoom in to the side of the planet to see the displacements without getting pinched landmasses. To correct it for spherical projection, the easiest way to do that is to black out the areas around the poles (top and bottom 1/4 of the map).

err, that's totally wrong, sorry for saying that so directly. For spherical projection of that image along the surface of the planet, you need to create a camera, place that exactly at the origin coordinates of the planet. Then you take an image map shader, set projection to "spherical" and plug the output of that image map shader into something that can generate displacement, such as a surface layer displacement port.

Regards,
Frank

freelancah

#7
Quote from: FrankB on June 11, 2011, 05:04:37 PM
Quote from: TheBlackHole on June 10, 2011, 10:13:36 PM
Increase the displacement amplitude.You'll have to go backwards with the camera into space, then zoom in to the side of the planet to see the displacements without getting pinched landmasses. To correct it for spherical projection, the easiest way to do that is to black out the areas around the poles (top and bottom 1/4 of the map).

err, that's totally wrong, sorry for saying that so directly. For spherical projection of that image along the surface of the planet, you need to create a camera, place that exactly at the origin coordinates of the planet. Then you take an image map shader, set projection to "spherical" and plug the output of that image map shader into something that can generate displacement, such as a surface layer displacement port.

Regards,
Frank

Sorry to mess this up even more but...

I think he's talking about the problem of the continent map not being in spherical form (equirectangular). Photoshops polar coordinate function can do this conversion if you convert from rectangular to polar and back. It has some loss of quality but it's better than nothing.. You can use higher resolution in the conversion and scale back to what you had to prevent some loss.
If you dont have a seamless proper equirectangular map you will have problems at the poles where image sides align and some pinching of landmasses in the top and bottom...  


Anyhow..I think that this map does work without the conversion, some slight distrubance from stretching of some continents but nothing massive.

I attached a working setup for you to look at..




Pentagular Dark

Ok problem solved, apparently after reading your posts and examining the .tgd I had the displacement completely wrong in my Terrain Nodes. Thank all of you for your input.
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