cylindrical projection

Tips for creating and manipulating planet textures for Celestia.
Topic author
ArneB
Posts: 48
Joined: 04.01.2004
With us: 20 years 10 months
Location: Norway

cylindrical projection

Post #1by ArneB » 20.10.2004, 20:37

Can anyone tell me or give me a link on how to get the appropriate "stretch" near the poles when creating a texture? And how do you make a nice and "seamless" texture without mirroring parts of the image? I use Photoshop.
Gal yuh fi jump an prance

-Shaggy

maxim
Posts: 1036
Joined: 13.11.2003
With us: 21 years
Location: N?rnberg, Germany

Post #2by maxim » 21.10.2004, 15:07

Short version:

Make a pic of the polar region as seen from above.
Use polar->rectangular filter from photoshop.
Merge polar region part of result with the rest of the texture.
finetune.

Seams:

Use offset filter from photoshop to move seam into the middle of the pic.
Do artwork.
Move back.

maxim

Topic author
ArneB
Posts: 48
Joined: 04.01.2004
With us: 20 years 10 months
Location: Norway

Post #3by ArneB » 21.10.2004, 17:25

thanks! Just what I looked for.
Gal yuh fi jump an prance



-Shaggy

Evil Dr Ganymede
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Joined: 06.06.2003
With us: 21 years 5 months

Post #4by Evil Dr Ganymede » 21.10.2004, 17:37

That's how I made the topographic map for my Blue Venus POVray texture. Works quite nicely. :)

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John Van Vliet
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re

Post #5by John Van Vliet » 30.10.2004, 18:52



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