Author Topic: Turbidity  (Read 7941 times)

2013-03-03, 17:02:40

SHD

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1) when turbidity >=10, crash


2) why shadows from sun always sharp?


3dsmax 2012
build from march 1 2013

2013-03-03, 17:32:16
Reply #1

Ludvik Koutny

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You mean that shadows should be softer when sun is closer to horizon or that shadows should be softer when turbidity is raised?

2013-03-03, 17:35:25
Reply #2

SHD

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You mean that shadows should be softer when sun is closer to horizon or that shadows should be softer when turbidity is raised?
yeap, i mean that shadows should be softer when sun is closer to horizon ..
« Last Edit: 2013-03-03, 17:39:07 by SHD »

2013-03-03, 17:39:25
Reply #3

Polymax

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"Sun Size" in CoronaSun is not it?
Corona - the best rendering solution!

2013-03-03, 17:51:31
Reply #4

SHD

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"Sun Size" in CoronaSun is not it?
yeap, it is clear
but the problem with Turbidity>=10 need be fix i think

2013-03-03, 18:06:21
Reply #5

Polymax

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I think the maximum value of 10, just counter must be limited to 10.
Corona - the best rendering solution!

2013-03-03, 18:34:41
Reply #6

Ludvik Koutny

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I never realized sun shadows should get softer at sunset... I always thought that sun disk does not change size.... Sun light probably get's more scattered when it's in more parallel angle with atmosphere...

2013-03-03, 18:38:46
Reply #7

Ondra

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They should not get softer, but dimmer. Currently it works exactly like the models it is based on should. Use the sun size parameter for artistic control.

I've also limited the turbidity spinner.
Rendering is magic.How to get minidumps for crashed/frozen 3ds Max | Sorry for short replies, brief responses = more time to develop Corona ;)

2013-03-03, 22:19:01
Reply #8

maru

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I never realized sun shadows should get softer at sunset... I always thought that sun disk does not change size.... Sun light probably get's more scattered when it's in more parallel angle with atmosphere...

Doesn't sun disk get bigger because of atmospheric refraction when it's closer to horizon? That's why we sometimes see huge setting sun/moon, right?
Marcin Miodek | chaos-corona.com
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2013-03-03, 22:50:11
Reply #9

Ondra

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I don't think so. We see huge sun/moon because of telephoto lenses ;)
Rendering is magic.How to get minidumps for crashed/frozen 3ds Max | Sorry for short replies, brief responses = more time to develop Corona ;)

2013-03-03, 22:52:18
Reply #10

Ludvik Koutny

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I never realized sun shadows should get softer at sunset... I always thought that sun disk does not change size.... Sun light probably get's more scattered when it's in more parallel angle with atmosphere...

Doesn't sun disk get bigger because of atmospheric refraction when it's closer to horizon? That's why we sometimes see huge setting sun/moon, right?

There are currently two fighting theories with no 100% winner. One is indeed atmospheric refraction, while other one is an optical illusion caused by brain perceiving size differently when comparing sun/moon in relation to horizon. Nowadays, optical illusion theory has a lot more supporters than atmospheric refraction one ;)

More info here http://en.wikipedia.org/wiki/Moon_illusion
« Last Edit: 2013-03-03, 22:54:54 by Rawalanche »

2013-03-04, 10:47:13
Reply #11

maru

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Quote
Moon appears about 1.5% smaller when it is near the horizon than when it is high in the sky
My mind just got raped. :(
Marcin Miodek | chaos-corona.com
3D Support Team Lead - Corona | contact us