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Avoid using map imputs with gradients! Use threshold instead!

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uberzev
not lyftzev

Posts: 1890
Filters: 36


On my machine the render times are...

Threshold: 1.5
Profile Gradient: 2.4

Quite a speed difference for the exact same effect. smile:deer:

Threashold FTW!.ffxml
Posted: April 2, 2007 5:29 am   Details E-Mail
Vladimir Golovin
Administrator
Posts: 3446
Filters: 55
That's perfectly reasonable -- Threshold is generally much faster than the gradient.
Posted: April 2, 2007 9:17 am   Details E-Mail
uberzev
not lyftzev

Posts: 1890
Filters: 36
Quote
Vladimir Golovin wrote:
That's perfectly reasonable -- Threshold is generally much faster than the gradient.
Reasonable, yes. Intuative, no. smile:D
Posted: April 2, 2007 1:47 pm   Details E-Mail
Crapadilla
lvl 52 Filter Weaver and Official "Filter Forge Seer"

Posts: 4365
Filters: 65
Stuff like this should be collected into a 'Secrets of the Pros' section in the wiki. It should be hosted by one of the resident Three Snippeteers... smile:D

I remember there was a tips&tricks/undocumented features thread somewhere. Maybe that could be mined too!
--- Crapadilla says: "Damn you, stupid redundant feature requests!" ;)
Posted: April 14, 2007 2:28 pm   Details E-Mail
Vladimir Golovin
Administrator
Posts: 3446
Filters: 55
Quote
uberzev wrote:
Reasonable, yes. Intuative, no.


Our intuition tells us that the Earth is flat, while it isn't.
Our intuition tells us that the Sun revolves around the Earth, while it doesn't.
Our intuition tells us that a rock is solid, while it isn't.

Resume: use it with discretion smile;)
Posted: April 16, 2007 6:03 am   Details E-Mail
uberzev
not lyftzev

Posts: 1890
Filters: 36
Wait rocks aren't solid?
Posted: April 16, 2007 6:07 am   Details E-Mail
Vladimir Golovin
Administrator
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"Science has taught us, against all intuition, that apparently solid things like crystals and rocks are really almost entirely composed of empty space. The familiar illustration is the nucleus of an atom as a fly in the middle of a sports stadium. The next atom is right outside the stadium. So it would seem that the hardest, solidest, densest rock is really, quote "really" almost entirely empty space, broken by only tiny particles so widely spaced that they shouldn’t count."
Posted: April 16, 2007 6:24 am   Details E-Mail
uberzev
not lyftzev

Posts: 1890
Filters: 36
^^^You just blew my mind^^^
Posted: April 16, 2007 6:26 am   Details E-Mail
Crapadilla
lvl 52 Filter Weaver and Official "Filter Forge Seer"

Posts: 4365
Filters: 65
Quote
uberzev wrote:
^^^You just blew my mind^^^


It's 'all in your head' anyway! smile;)
--- Crapadilla says: "Damn you, stupid redundant feature requests!" ;)
Posted: April 16, 2007 6:31 am   Details E-Mail
Kraellin
Kraellin

Posts: 12749
Filters: 99
and now you have some idea of why a black hole can exist smile:)

also, i recall seeing a science show where a baseball pitcher throws a ball to a batter and the batter hits the ball. but, the science said, the bat never actually hits the ball, the particles of the ball. the bat and ball never really touch. only the energies of the two collide giving the apparency of actually hitting each other.

that one blew my mind smile:)
If wishes were horses... there'd be a whole lot of horse crap to clean up!

Craig
Posted: April 16, 2007 2:32 pm   Details E-Mail
SpaceRay
SpaceRay

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Filters: 35
Interesting to know and learn about this. Thanks
Posted: March 27, 2012 2:41 am   Details E-Mail
Mongoose King
Mongoose King

Posts: 257
Filters: 21
Quote
Vladimir Golovin wrote:
"Science has taught us, against all intuition, that apparently solid things like crystals and rocks are really almost entirely composed of empty space. The familiar illustration is the nucleus of an atom as a fly in the middle of a sports stadium. The next atom is right outside the stadium. So it would seem that the hardest, solidest, densest rock is really, quote "really" almost entirely empty space, broken by only tiny particles so widely spaced that they shouldn’t count."


Also the 'particles' aren't really particles at all.
Release the Mongoose!
Posted: March 27, 2012 8:08 am   Details E-Mail
SpaceRay
SpaceRay

Posts: 12299
Filters: 35
I have to say that what I find interesting is the FIRST and SECOND post and much less the scientific theory of that materials are not solid smile:D

Quote
Mongoose King wrote:
Also the 'particles' aren't really particles at all.


http://www.expressionsofspirit.com/quantumphysics.htm

Quote
In this intriguing look at quantum physics and the nature of the physical world the author explores the break-through concepts of modern science that support the ancient beliefs put forth by eastern and indigenous teachings that we live in a world of illusion.

The physical world in fact is both particle and wave and is unified in one interacting whole. The concept that we are "light beings" takes on a clearer meaning through this revelation.

We may then consider every cell in the human body as a library of information. Each cell is made of molecules, each molecule is made of atoms, and atoms are made of electrons, neutrons, and protons.

In connection with Einstein's familiar formula, E=mc2, we have been taught that matter and energy are equivalent, that we can convert energy into matter, and that the energy in a piece of matter is equal to the mass of the matter times the speed of light squared.

Thus, even minute amounts of matter represent a lot of energy However, while in the past it was believed that electrons were particles-matter existing at some point in space-now, according to particle physics, electrons are not particles all of the time, but sometimes behave like waves of light.

The current consensus is that they are both wave-like and particle-like, as is all matter. In fact, in the world of quantum physics, it seems these elementary "particles" (including electrons) don't really exist at all.

What does exist are relationships, correlations, tendencies to actualize from a multifaceted set of potentials. A quantum physicist might say that electrons, like all other subatomic particles, are described by a "probability density state." At this level it is strikingly evident that there may be no objective physical reality at all.

What the scientific community once thought was there in the sub-atomic realm and what the educated world was taught to perceive as real simply does not exist.

The new physics tells us that matter may actually be nothing more than a series of patterns out of focus and that subatomic "particles" aren't really made of energy, but simply are energy!

The subatomic world of electrons, protons, and neutrons may thus be viewed as patterns of vibration within what Rupert Sheidrake calls a morphogenetic field, an organizing field that underlies a system's structure.
Posted: March 27, 2012 9:44 pm   Details E-Mail

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