decay of light

SUBMITTED BY: RAHUL ARORA

DECAY

LIGHT is An aRt AnD DECAY onE oF ITs pArT.


DECAY

What Is

DECAY ?


DECAYDecay in simple words implies decline of

something or you can say rotting of an object after a particular period of time or in case of light we can say that after a particular distance.Some examples that help you to understand DECAY better are1. Decline of a King after a particular century2. Radioactive carbon decay3. Decay of gums4. Decay of plants


DECAY

WHY LIGHT DECAYS

AFTER A PARTICULAR DISTANCE?


DECAY

Every light in the real world has a decay. In simple words, the farther away you get from a light, the dimmer the illumination from the light becomes. This is because the light

waves (or particles that we say photons) are spreading out and becoming less dense over distance.


DECAYHere are some

examples that show

“DECAY OF LIGHT”


DECAY


DECAYThis was all a basic

information about DECAY, so that you can able to understand what actually DECAY is.Now moving on towards software point of view how we use decay in our VIRTUAL WORLD( i.e. 3D world).


DECAY

DECAY

LINEAR DECAY QUADRATIC DECAY CUBIC DECAY


DECAYLINEAR DECAY

light intensity decreases directly (linearly) with distance (slower than real world light).Inverse is another way of describing a LINEAR DECAY. For example:-If the light has an intensity of 1.0 at the source and in intensity of 0 at a distance of one meter, then we know that at 0.5 meters, the intensity will be 0.5.


DECAY


DECAYQUADRATIC DECAY

light intensity decreases proportionally with the square of distance (the same as real world light) . Because light is spreading out both horizontally and vertically as it is transmitted away from the light source, its intensity, and therefore the density of photons, must be spread out both horizontally and vertically.


DECAYThis means that the

intensity will be measured by the inverse square of the distance from the light source. Light using the QUADRATIC DECAY setting will tend to be much brighter at the source and will decay in brightness much more quickly. This is how it works in the real world, but most people don’t notice because they don’t spend much time staring at light sources.


DECAY


DECAYCUBIC DECAY

light intensity decreases proportionally with the cube of distance (faster than real world light ).


DECAY


DECAYComparison

Between No decay, Linear decay,

Quadratic decay and Cubic decay.NO DECAY LINEAR

DECAYQUADRATIC

DECAYCUBIC DECAY


DECAYDECAY

REGIONSIt is another method or we can say that advance technique to control the decay of light. Particularly we are provided three decay regions as according to our respective software i.e. MAYA. These regions help us to control the decay of light over a particular region.


DECAY


DECAYGENERAL

INFORMATION We are also provided intensity curves to control the decay of light with the help of curves. You can also create artistic effect with this. There is also PENUMBRA REGION (i.e. Partially shadowed region)which help us to control softness of light. We are also provided DROPOFF region. It controls the rate at which light intensity decreases from the center to the edge of the spot light beam. LINEAR DECAY is also known as INVERSE DECAY(IN MAX). QUADRATIC DECAY is also known as INVERSE SQUARE DECAY(IN MAX).


DECAY

PENUMBRA REGION DROPOFF

SPOT WITH NO PENUMBRA REGION

SPOT WITH ADDED FOG AND NO DROPOFF

COMPARISON


DECAY

THIS BRING US TO THE

END . I HOPE YOU ARE

NOW ABLE TO

UNDERSTAND HOW DECAY WORKS AND

WHY IT IS IMPORTANANT

.


DECAY

GALLERY


DECAY


DECAYLIGHT

IS ANART &

DECAYIS ITS HEART.

decay of light

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