Chaos Corona Forum

Chaos Corona for 3ds Max => [Max] Bug Reporting => [Max] Resolved Bugs => Topic started by: SHD on 2013-03-03, 17:02:40

Title: Turbidity
Post by: SHD on 2013-03-03, 17:02:40

1) when turbidity >=10, crash
(http://farm9.staticflickr.com/8377/8525029202_4d9dc25710_o.jpg)

2) why shadows from sun always sharp?
(http://farm9.staticflickr.com/8372/8523914561_8870881445_o.jpg)

3dsmax 2012
build from march 1 2013

Title: Re: Turbidity
Post by: Ludvik Koutny on 2013-03-03, 17:32:16

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

Title: Re: Turbidity
Post by: SHD on 2013-03-03, 17:35:25

Quote from: Rawalanche on 2013-03-03, 17:32:16

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 ..

Title: Re: Turbidity
Post by: Polymax on 2013-03-03, 17:39:25

"Sun Size" in CoronaSun is not it?

Title: Re: Turbidity
Post by: SHD on 2013-03-03, 17:51:31

Quote from: Polymax on 2013-03-03, 17:39:25

"Sun Size" in CoronaSun is not it?

yeap, it is clear
but the problem with Turbidity>=10 need be fix i think

Title: Re: Turbidity
Post by: Polymax on 2013-03-03, 18:06:21

I think the maximum value of 10, just counter must be limited to 10.

Title: Re: Turbidity
Post by: Ludvik Koutny on 2013-03-03, 18:34:41

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...

Title: Re: Turbidity
Post by: Ondra on 2013-03-03, 18:38:46

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.

Title: Re: Turbidity
Post by: maru on 2013-03-03, 22:19:01

Quote from: Rawalanche on 2013-03-03, 18:34:41

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?

Title: Re: Turbidity
Post by: Ondra on 2013-03-03, 22:50:11

I don't think so. We see huge sun/moon because of telephoto lenses ;)

Title: Re: Turbidity
Post by: Ludvik Koutny on 2013-03-03, 22:52:18

Quote from: maru on 2013-03-03, 22:19:01

Quote from: Rawalanche on 2013-03-03, 18:34:41

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 (http://en.wikipedia.org/wiki/Moon_illusion)

Title: Re: Turbidity
Post by: maru on 2013-03-04, 10:47:13

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. :(