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help on light leaks?

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help on light leaks? Empty help on light leaks?

Post by jen_tol84 Fri Jan 20, 2012 4:24 am

Hello cgp!
I often encounter this problem on lighting. Parang may nagleleak na light pero kong ichechek ko yong model e wala namang butas. Baka may idea po kayo mga master kong paano ito maiwasan. Time consuming pa kasi pag edit pa sa photoshop.
Thanks in advance!
help on light leaks? Lightleak2

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Post by bokkins Fri Jan 20, 2012 9:04 am

babaan mo ang shadow bias ng ilaw from 0.2 to 0.002.
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Post by jen_tol84 Sun Jan 22, 2012 2:52 am

bokkins wrote:babaan mo ang shadow bias ng ilaw from 0.2 to 0.002.
Sir ginawa ko yong sabi niyo pero ayaw parin. I also tried changing the material to vray override matl and even shifting my camera and sun position gaya ng nasearch ko sa web pero ayaw parin.
Then I found out, through trial and error, that by changing the vray Irradiance map current preset from 'very low' to 'medium' or 'high' the light leak is solved.. Pero tumagal kasi konti rendering time ko. Smile
Baka po may nakakaalam sa mga masters natin technical explanation nito? Thanks!
Ito po pala result (Irr current preset= medium)
help on light leaks? 44844884

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Post by bokkins Sun Jan 22, 2012 6:10 am

Pwedeng very low pa din, taasan mo lang ang HSph subdivs at interp samples. 60 30 pwede na.
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Post by celes Sun Jan 22, 2012 9:43 pm

try this approach, and experiment with low settings.

just a hunch

help on light leaks? Lightleaks



it just means try modelling 1 solid mesh for the wall and awning.
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Post by jen_tol84 Mon Jan 23, 2012 3:53 am

bokkins wrote:Pwedeng very low pa din, taasan mo lang ang HSph subdivs at interp samples. 60 30 pwede na.
Sir ginawa ko nang 80 40 pero ayaw padin..
By trial and error ulit, nalaman ko na pag binago ko yong ibang values ng basic parameters ng current preset e nawawala yong light leak (see below), and halos pareho lang render time ko sa 'very low' na setting (a minute difference).
help on light leaks? Solved



Thanks.
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Post by jen_tol84 Mon Jan 23, 2012 4:01 am

celes wrote:try this approach, and experiment with low settings.

just a hunch

help on light leaks? Lightleaks



it just means try modelling 1 solid mesh for the wall and awning.

Wow this one works! Even in a 'very low setting'. Since I'm modelling in revit, I did this by hitting 'join geometry' in revit and updating my scene in 3dmax, hit render and the leak is gone. Thanks Sir!
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Post by bokkins Mon Jan 23, 2012 6:22 am

ah I see. so it's a bug pala from a revit model. I think that's it. Thanks for sharing this. This is a good reference for future revit to 3ds exports. 2thumbsup
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Post by celes Mon Jan 23, 2012 11:12 pm

Good luck jen, happy rendering Very Happy
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Post by ciaoriki Wed Feb 08, 2012 10:55 pm

light leaks are cause by poor light cache solution, pag artifacts sa irradiance map .

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Post by Bosepvance Thu Feb 09, 2012 10:28 pm

jen_tol84 wrote:
bokkins wrote:Pwedeng very low pa din, taasan mo lang ang HSph subdivs at interp samples. 60 30 pwede na.
Sir ginawa ko nang 80 40 pero ayaw padin..
By trial and error ulit, nalaman ko na pag binago ko yong ibang values ng basic parameters ng current preset e nawawala yong light leak (see below), and halos pareho lang render time ko sa 'very low' na setting (a minute difference).
help on light leaks? Solved



Thanks.


na-encounter ko na rin ito bro, ina-udjust ko from low to medium ang preset kaya naaayus ang leak pero tama ka medyo tumatagal ang rendering time. Thanks sa new info. try ko ito sa next work ko...
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Post by Bosepvance Thu Feb 09, 2012 10:31 pm

bokkins wrote:ah I see. so it's a bug pala from a revit model. I think that's it. Thanks for sharing this. This is a good reference for future revit to 3ds exports. 2thumbsup

in addition lang sir Bokkins pati din po from cad to 3dmax may leak din po. Pero yun nga pag inadjust pataas ang current preset ng irradiance map nawawala ang leak yun lang tumatagal ang rendering time...
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