found this article for rainbows.  something about HSV->RGB conversion function.

http://objectmix.com/python/352080-how-make-rainbow-rgb-values.html

would someone help me to understand to  make this into poser rainbow?

can a custom color node be made from this?

thanks.  i didn't pass classes after pre-calculus

 

http://docs.python.org/library/colorsys.html

---

♥ My Gallery Albums    ♥   My YT   ♥   Party in the CarrarArtists Forum  ♪♪♪ 10 years of Carrara forum ♥ My FreeStuff

Are you asking about Python or asking about materials - or both?

And you ask "can a custom color node be made from this?" - we cannot make custom nodes of any kind. So no.

There is already an HSV node in Poser materials. It will make a rainbow color table from any grayscale pattern.

Setting these up in matmatic is easy, if you use matmatic.

Assuming you have a pattern in "pattern" you would do:

HSV(YELLOW, pattern, 1, 1)

 

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)

rainbow snowcone time out. cuz 7 hours of fail can be depressing.

 

thanks BB!  rainbows with hsv magick.

after reading the colorsys info, my first thought was the possibilities of working it into a node like color_ramp or wood.  mentioning the wood because it has rings and rainbows usually arch.

---

♥ My Gallery Albums    ♥   My YT   ♥   Party in the CarrarArtists Forum  ♪♪♪ 10 years of Carrara forum ♥ My FreeStuff

.

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)

.

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)

.

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)

.

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)

oh woww.  thanks!!!

is it possible to make like a soft gradient progressing through the colours?

---

♥ My Gallery Albums    ♥   My YT   ♥   Party in the CarrarArtists Forum  ♪♪♪ 10 years of Carrara forum ♥ My FreeStuff

oh wow, i just tried out the first option with a different colour and got this

 

edited, would help with a pic, lol

 

PPPS, thanks BB  :)

Tools:- Win10, Dell XPS8900, ZBrush, Marvelous Designer 11, Hex 2, PSP8. PSP 2019 Ultimate, DAZ Studio, Affinity Photo, Affinity Designer, Filterforge 11, flowscape,  Classic UVMapper, and several headache tablets. 

Spotties :lol:

Tools:- Win10, Dell XPS8900, ZBrush, Marvelous Designer 11, Hex 2, PSP8. PSP 2019 Ultimate, DAZ Studio, Affinity Photo, Affinity Designer, Filterforge 11, flowscape,  Classic UVMapper, and several headache tablets. 

this one looks promising. 

http://www.creative-3d.net/images/p5_material_room.jpg

i can't make out the blue setting, it's not 1.

---

♥ My Gallery Albums    ♥   My YT   ♥   Party in the CarrarArtists Forum  ♪♪♪ 10 years of Carrara forum ♥ My FreeStuff

if one wants a spectrally accurate rainbow, use bill's shader.  banding is likely as saturation increases.  however, if one wants a smooth day-glo rainbow, try bill's technique he used on his poser 6 lite meter, modified below.  to get more roygbiv, blend two ramps.

p.s. that user defined 22 node in your example might work even better.

blend 2 ramps! 

and add in BB's examples for the arches.

---

♥ My Gallery Albums    ♥   My YT   ♥   Party in the CarrarArtists Forum  ♪♪♪ 10 years of Carrara forum ♥ My FreeStuff

Quote - Spotties :lol:

gotta luv the cellular node.  and the random color option.

---

♥ My Gallery Albums    ♥   My YT   ♥   Party in the CarrarArtists Forum  ♪♪♪ 10 years of Carrara forum ♥ My FreeStuff

Quote - > Quote - Spotties :lol:

gotta luv the cellular node.  and the random color option.

 

I know, lol. i was just messing around with it all yesterday, you get better ones with the tile option on a very blurry mortar. But this does open a multitude of ideas, I didn't realise you could get a rainbow colours in the mat room with nodes, :)

Tools:- Win10, Dell XPS8900, ZBrush, Marvelous Designer 11, Hex 2, PSP8. PSP 2019 Ultimate, DAZ Studio, Affinity Photo, Affinity Designer, Filterforge 11, flowscape,  Classic UVMapper, and several headache tablets. 

no chocolate cigars.  groan.  the yellow and green isn't showing

styling is a different matter,    i can never be happy with the roots

---

♥ My Gallery Albums    ♥   My YT   ♥   Party in the CarrarArtists Forum  ♪♪♪ 10 years of Carrara forum ♥ My FreeStuff

You've mistakenly assumed the "V" coordinate goes from 0 to 1 along each hair. The UV coordinates go with the skin. You are reading the U coordinate of the location of the base of each hair - all of which are near the top of the head UV map, so in the blue-violet range.

If you want rainbow hair, you have to get the hidden "W" coordinate. The W coordinate is a 3rd texture dimension going 0 to 1 from base of hair to tip. The only node that can access this coordinate is the Hair node.

A couple years ago I figured out a way to extract the value of the "W" coordinate and use it to make rainbow hair.

http://www.renderosity.com/mod/forumpro/showthread.php?thread_id=2807241

---

Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)

misty, you see he's using a colour ramp there.  would suggest losing the user-defined hsv node until it has been further demonstrated in this regard.

the 3rd texture dimension !

woww, thanks!

---

♥ My Gallery Albums    ♥   My YT   ♥   Party in the CarrarArtists Forum  ♪♪♪ 10 years of Carrara forum ♥ My FreeStuff