Maxwell Render | Official public forum

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what a nice modeling 8etty these were not the LEDs we tried b4
i see your studio setup works well and materials are amazing.
in fact, these leds are very easy to render, you just need to set their
materials as color dielectrics with a low UV (like 0.3) or maybe no UV. ---> the setup u use for the back cover seems the same that i'm trying to tell.
place square emitters at their bases and it must work!
let me try when i have time

hi!
in http://www.3dcontentcentral.com you can download leds models for free.

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if the real LEDs have very rough surface like this then it seems it's OK.
and as we considered before, one emitter is cool there....
for breaking up this uniform seem of LEDs you must give a very high
absorbtion value (like 0.98 or 0.99) and then you can even give a higher
energy to emitter which won't make your leds white due to absorbtion.
if this won't satisfy, you have to put little emitters for each to achieve the
light propagation in the LED body with absorbtion.

Not very satisfied with it. Not red enough. Maybe higher absorption?

HD

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the unlit leds shouldn't reflect the light from the lit ones so much. So you need pretty high roughness.

8etty wrote:thanx tom..(hitting your head with 427 green squishy balls to simmulate lightbouces) but such a high absorbtion is kinda odd..these leds absorb 40% of the light at most

8etty, the ratio %40 is not in linear relation with the value 0.99 and if you
really want some crispy reflections to make them seem more attractive
you also need to model some simple geometry cavities within.
maybe it's better for me to make one and post here....

mihai, why they shouldn't reflect the lights comin' from each other? i also
have LEDs here and some of them are crystal bright and they reflect
nearly everything.

hdesbois, i don't mean you can solve everything with absorbtion.
absorbtion is a must because it gives more SSS look for rough dielectrics.
for your leds, you can make the emitter color red to have more red or
you can saturate you dielectric's transparancy color more...
the choice is yours....
btw/ your leds are what i'm trying to tell, cool red LEDs man!

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hmm.....maybe you're right tom, but i just don't think it should have such sharp reflections. like most of the signs i've seen are like this one:



So it makes me think that since Maxwell uses realistic falloff for lightsources, and since the diode is so tiny, the light would be very bright at the center, but it's strength would quickly diminish.

8etty wrote:so 0.99 absorbtion does not mean 99%

IMHO, it mostly depends on the real size of your object.
I mean 0.1 absorbtion may be enough to make a 1 meter cube dark and
in other hand 0.99 can't be yet powerful to absorb the light energy for millimeters.

8etty wrote:can't see no cavity in my leds..will cut one open..are they poisonous

you are right, there's no cavity but inserted pieces of parts you know and
since you insert them directly without booling, you won't have enough
reflections but if you booled and placed them then it's OK, maybe they
are hidden due to high roughness. but i believe the most attractive part
of a LED is refracted seem of core parts. you must have them slightly somehow.

Mihai Iliuta wrote:hmm.....maybe you're right tom, but i just don't think it should have such sharp reflections. like most of the signs i've seen are like this one:

IMHO what you see there is "light bloom" covering led body

Mihai Iliuta wrote:Maxwell uses realistic falloff for lightsources, and since the diode is so tiny, the light would be very bright at the center, but it's strength would quickly diminish.

You're right but for small distances absorbiton will make this falloff stronger.
This is why I told it...

8etty wrote:.... ours kinda look like alice-in-wonderland-leds

Here is the Thomas-in-wonderland kind:

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