Hurricane/tornado

Mr_Lamppost · February 01, 2008, 07:37:26 PM

UPDATE:

I made some progress on version 2

I am now happier with the density and twist functions, now separate but am having little success with the multiple Perlin.

I have not implemented positioning yet

rcallicotte · February 01, 2008, 08:24:05 PM

This is pretty cool. I'm still tinkering with your work and Alfamike's work and the changes I made to both. I've combined both storm systems...the render should be done by next Monday. I've more or less been messing with it all week.

Mr_Lamppost · February 01, 2008, 08:27:53 PM

Cool

Bring on Monday

Will · February 01, 2008, 08:51:45 PM

ooo progress.

j meyer · February 02, 2008, 10:28:51 AM

yeah,keep it going!

Mandrake · February 03, 2008, 11:17:04 AM

Your work here is looking real great M_L. I tried version one and it came out ok.
But when I looked at it from orbit, it was very small, so I was thrilled to see your image of ver. 2
I can't wait to see if you'll be able to stack them for a more emmm "Luc" type look to the system.
Keep up the great work, as this node system is way off my charts right now.

NWsenior07 · February 03, 2008, 11:06:34 PM

Well this entire technique has gone way over my head, but what I'm seeing and from the math jargon I do understand, this is impressive work! I look forward to seeing your results calico and I'm excited to see what lies ahead for this little project.

rcallicotte · February 04, 2008, 08:35:14 AM

Not very happy with the end result. Needs a lot more work - http://forums.planetside.co.uk/index.php?topic=3338.0

rcallicotte · February 04, 2008, 10:11:20 AM

Please let us know how you did this spiral out of the ground.

Quote from: Mr_Lamppost on January 27, 2008, 04:12:59 PM
There are a few things that could be improved

I have already been looking at using a power of the distance from the centre to drive the density curve as a way to make the eye bigger. Having the functions set up in a POV-Ray scene lets me very quickly make changes and see the graph of the result. Once I have a result I like I can then build an equivalent node group.

There may also be some merit in using different functions for the rotation and density. I used the same function for this test as they both needed a similar curve and it saved on the number of nodes, now they are more organised adding a second function shouldn't be a problem.

I am also looking at ways of adding roughness to the Perlin.

I am not sure how vital this is but it may be worth adding the ability to set an arbitrary centre. The hurricane can be positioned by adding a transform shader to the cloud layer but it would be neater to have this as part of the hurricane.

I noticed that Cyber-Angel asked about applying these functions to the terrain.

Hurricane Island
There is some fairly extreme displacement there so the shadows are mush but I kind of like it.

rcallicotte · February 04, 2008, 07:04:16 PM

Never mind. I figured it out.

Mr_Lamppost · February 04, 2008, 09:04:54 PM

Just replied to your other post

j meyer · February 05, 2008, 10:11:32 AM

While playing with Mr_L's file i've noticed that it works
without the merge shader set up aswell.Just for the
record.

Mr_Lamppost · February 05, 2008, 08:54:13 PM

Quote from: j meyer on February 05, 2008, 10:11:32 AM
While playing with Mr_L's file i've noticed that it works
without the merge shader set up aswell.Just for the
record.

Sorry I am in the middle of something else but I don't see how it can work without the Merge shader.

Please elaborate.

rcallicotte · February 06, 2008, 11:34:27 AM

My last attempt. Anyone want to mess with the TGD?

j meyer · February 06, 2008, 01:33:37 PM

I'm afraid i can't shed any light on it as to how it can work
without the merge shader set up,but it does.Maybe some
fault in the maths or perhaps one of TG2's marvels,i have
no idea,honestly.I just tried it for some reason and the
result seems to be the same,see attachment,please.

Edit:I've set the quality to det0.5 and GI 1/1 to save
some time.