Sjeiti
 |
||||
| Posted: April 17, 2008 1:53 am | ||||
|
Sjeiti
|
Very cool!
Almost what I've been looking for. Too bad 2x1 is not seamless. |
|||
| Posted: April 17, 2008 2:10 am | ||||
ThreeDee
 |
It is made for 2x1 proportions. Does your 3D program require it to be those dimensions? If so, you can stretch (or squish) it to those proportions if need be, the features are still going to be proportionate to a 2x1 wrapped sphere...
|
|||
| Posted: April 17, 2008 12:29 pm | ||||
Kraellin
 |
someone care to explain the purpose of this one?
If wishes were horses... there'd be a whole lot of horse crap to clean up!
Craig |
|||
| Posted: April 17, 2008 1:33 pm | ||||
Mousewrites
 |
If you wrap this on a sphere, Craig, the noise will appear the same size throughout. It's distorted at the top and bottom to make up for the distortions in size you get at the top and bottom of the sphere (the poles).
Think of it as the opposite of one of those global projection maps that make it look like Greenland is bigger than most of America. It's distorted in the same way. |
|||
| Posted: April 17, 2008 2:21 pm | ||||
| jffe |
----Err, like spherical HDRI mapping ? jffe Filter Forger |
|||
| Posted: April 17, 2008 2:27 pm | ||||
|
ThreeDee
|
Nothing to do with HDRI (high dynamic range image).
It's for making texture maps for planets and other spherical objects without seams and minimum distortion. Alright, I'll render a sample so you get the idea. |
|||
| Posted: April 17, 2008 3:10 pm | ||||
|
ThreeDee
|
Okay, here you can see what it does (as Mousewrites explained): On the left you see the result from mapping (or wrapping) a regular noise texture on a sphere; you get distortion at the poles (as well as equator) and a seam. The seam you can get rid of in FF by making a seamless texture, but the distortions remain. To the right, planetary noise wrapped onto a sphere. |
|||
| Posted: April 17, 2008 3:24 pm | ||||
| jffe |
----Hmm. O.k., but theoretically, couldn't you just swap out the Perlin Noie or whatever, and put an image input, and use it to to do spherical mappings for HDRI lighting type stuff, like the 7 environments that are included with FF ? jffe Filter Forger |
|||
| Posted: April 17, 2008 3:47 pm | ||||
|
Kraellin
|
ok, i get it. thanks
 If wishes were horses... there'd be a whole lot of horse crap to clean up!
Craig |
|||
| Posted: April 17, 2008 10:31 pm | ||||
|
ThreeDee
|
Oh I see what you mean -- yes, the HDRI environments use the same type of mapping. So yes, you could do what you say here, replace the noise with an image and use the resulting image as a seamless environment map -- which wouldn't necessarily look like a real environment unless you shot it with a fish-eye lens. But you could definitely do good, seamless environment maps for reflecting all sorts of things. Good idea! |
|||
| Posted: April 19, 2008 12:57 pm | ||||
| jffe |
----So umm, will ya make me a proper convert-any-picture-to-fisheye-lense filter then ?  I actually tried before, but I'm better at patterns and randomess than I am at the technical/useful stuff ha-ha.
jffe Filter Forger |
|||
| Posted: April 19, 2008 4:38 pm | ||||
uberzev
 |
Hey ThreeDee, you should be able to increase the performance of this filter somewhat if you use my optimized version of the polar to rectangular mapping.
http://www.filterforge.com/filters/1762.html |
|||
| Posted: May 10, 2008 5:55 am | ||||
Join Our Community!
Filter Forge has a thriving, vibrant, knowledgeable user community. Feel free to join us and have fun!
33,712 Registered Users
+19 new in 30 days!
153,533 Posts
+31 new in 30 days!
15,348 Topics
+73 new in year!
Online Users Last minute:
26 unregistered users.
Recent Forum Posts:
- Manson Grudge Border by Jaret by Minko
yesterday - Kaleidoscopic Variations Vol. 2 by jhantares by jhantares
September 10, 2025 - Polygonal Images Set by Ramlyn by westdale
September 10, 2025 - FF Killing Resolution by SpaceRay
September 9, 2025 - Geometry Spinner by Rachel Duim by Rachel Duim
September 6, 2025 - Channel Glitch by Martin Naumann by SpaceRay
August 31, 2025 - Circuit Glitch by Martin Naumann by SpaceRay
August 31, 2025 - Groovy Rays by Ramlyn by Ramlyn
August 31, 2025 - Is Ultraforge dead? by dpankros
August 30, 2025 - Component Instances by AussieDecalf
August 27, 2025 - Hyperbolic Tiling Challenge by AussieDecalf
August 27, 2025 - Chaos Fields by SpaceRay
August 27, 2025
