The Orange Head

Another from the same filter:

nice, indigo. i particularly like that last one.

The toaster's broken, but the bread's still good.

I was experimenting with brightness when I came up with this one. If you were to turn up the brightness of an image to 100% (not lightness, brightness, the Y axis in color pickers), then the image would look noisy (middle image). This is caused by very dark but not black areas that tend to have their saturation turned all the way up (which still looks almost black). By controlling the saturation (right image), you can keep really dark or light areas in the original image from popping out with random colors. This is my doggy by the way

i dont quite understand the term 'water caustics' here. but then, maybe i'm missing a definition of 'caustics'? i mean, what the heck is caustic about water? kind of interesting, though

...that was quick. When I said caustics on the seafloor, I thought of replacing the blue color with an image of the seafloor. Or any image of your choice.

Not exactly the colored highlights i was thinking of, but pretty nice anyway. Vivid light FTW!

He might want the whole article Indigo.

http://en.wikipedia.org/wiki/Caustic_(optics)

^^^
Did not work as a link.

Just select the whole line and paste it in, unless you just click the optics link on the caustic page.

But the pictures give you an example, no? I agree, I don't understand what that kind of envelope is anyway. It might be a modulator to the light that is shining through. Here's a quick picture I made that might help.



I forgot to finish the very middle part; It's supposed to say Concentrated Light

Hope it helps

so an envelope of light is basically just a bundle of light rays?

so, the caustic is once the light is bent by whatever? it's the end result of that bending or going through something and bending and how it 'splashes' onto something after that?

because it's been through the bending of the glass. ok. i still dont like the name 'caustic' for that. bent beam would have worked just as well, in my book but, ok. so, 'envelope' in your example, would be the beam of light coming through the glass? yes, no?

would that come from the common word definition then of envelope? where an envelope of the something (in this case, light) sort of spreads out and covers something? as in, 'there was an envelope of rain all around us.' something like that definition of envelope where something is actually enveloping in a way? if so, then i think i get it better now.

no clue, betis. i'll just take it that 'caustic' means the end result of light being bent or refracted or reflected when going to a different medium than the one it's currently in. the whole 'envelope', to me, at this point, means a bundle, or array or shape of light and doesnt matter that much, since i'm not really studying optics at the moment. but, thanks

It seems you have the same problem I have with my Galaxy Explorer. The refraction map for the sun is a sphere, white on the inside and black on the outside? replace the sun texture with a grid and you will see it is quite incorrect. Invert the Refract map and try it with a global refract height of about 7.

Thanks Betis. I think I knew that at one point but I forgot to do that with this filter. And I will continue to post an image with every response, so here's Betis' suggestion & a surface glow:

I actually agree with you, Craig. Maybe I could turn down the refraction (#1 was at 2, Betis told me to use 7 for #2). I'll be working on those solar flares, too.

Now here's what I meant to post. I like perspective stuff (in case you haven't noticed), and I've been trying to create an alternative to ThreeDee's method of a planar perspective. In ThreeDee's, you have to scale down everything (image, noise) in order to get the desired effect (the offset scales up).
Mine is based on a logarithmic pattern as demonstrated by this filter, and the great thing about it is that you don't have to scale down anything (the offset scales down). It's not entirely accurate, and there's still some issue with the ratio of height to width. Here's a comparison:

This one took some formula-working. A formula for the path of the metal balls, a formula to cut off the length of the strings so they would end underneath the balls, and a separate (not in FF) formula to calculate the effect of gravity on ball speed. There is one error I would like to point out, and that is the length of the string. The string gets shorter and longer as the side balls move. If I changed the sectors on the circular arcs pertaining to the ball path, this might have worked perfectly.

BTW, the balls are called "kinetic balls", and the contraption "Newton's Cradle".

pretty freakin cool, indigo

ya know, those balls look like they are coming forward, not side to side.

nice. a bit eggshell crate or styrofoam in texture, though. maybe reduce the noise/grain? marble columns could indeed chip, but their overall smoothness didnt tend to change. also, that grey pattern/texture you've got mixed into the white, try increasing the scale on that. it looks a bit too regular as is.

Wewt! Looks awesome!

I say angle the cracks though, they're too straight.

Cant...stop...forging...

If we throw salt over our shoulders and cross our fingers, then maybe V2 will see fractal branching, but if not, we'll just have to make do with what we have. To make the dark cracks in this dry mud bed, I applied a bias to stone noise. I then attached a perlin noise to the "bias" of the bias, which was added to tamper off the ends of the stone noise, one property that would be seen in fractal branching.