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daimon
 Post subject: HDRI Problem?
PostPosted: Thu Jun 11, 2009 9:17 am 
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Joined: Sat Mar 19, 2005 8:11 pm
Posts: 214
I render this car only with HDRI, I notice that the car has lots of white spots, is that a problem with the HDRI? or I may do something wrong?
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def4d
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 11:02 am 
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Hard to say without having your settings, but it seems it comes from your carpaint, try with a lambertian material, pretty sure dots will disappear!

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daimon
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 11:37 am 
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The rims having the same problem as well.
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mashium123
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 12:29 pm 
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Joined: Mon May 02, 2005 1:56 am
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Location: Essen, Germany
it''s all over the place, not just on the carpaint and rims... every place that receives lighting and is not shadowed shows these spots.
look under tha car, no [direct?] light= no spots?

how long did it cook? is it a low sl?

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def4d
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 1:19 pm 
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From my pov, it should come from reflective layers indirect caustics

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daimon
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 1:54 pm 
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its 3k res and its been rendering for 16hrs 19SL
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mashium123
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 2:21 pm 
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Location: Essen, Germany
daimon wrote:
The rims having the same problem as well.

also the tires... tiny but they are there... that's no place where indirect caustics would be... i guess...

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def4d
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 3:46 pm 
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Location: France
solved?

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daimon
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 9:26 pm 
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Joined: Sat Mar 19, 2005 8:11 pm
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I am rendering now with a cyclo setup, I will post the image when its done.
If that happens again I will probably render it with Mental Ray to be safe and keep my client happy.


Last edited by daimon on Thu Jun 11, 2009 10:50 pm, edited 1 time in total.

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def4d
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 10:17 pm 
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Location: France
Sometimes we are obliged to do things we don't like...

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daimon
 Post subject: Re: HDRI Problem?
PostPosted: Thu Jun 11, 2009 11:10 pm 
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So far it seems ok, but because i was in a hurry I didn't get a nice focus on the car :oops:
I will set it up correctly on monday and render it again with no hdri :D
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ingo
 Post subject: Re: HDRI Problem?
PostPosted: Mon Jun 15, 2009 12:42 pm 
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Its a problem with the hdri, try a different one. If that gives the same results blur the hdri or tone the lightest parts of the hdri down so it has not that intense contrast. Maybe a picture of the hdri will help to understand the problem.
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def4d
 Post subject: Re: HDRI Problem?
PostPosted: Mon Jun 15, 2009 1:33 pm 
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Location: France
i like your cow Ingo :lol:

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polynurb
 Post subject: Re: HDRI Problem?
PostPosted: Mon Jun 15, 2009 2:23 pm 
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must be a problem with very high exposures (like tiny sunspot) which causes the speckle.

looks like you have to adjust gamma to 2.2 before using the hdr.

if that still leaves speckles download hdrshop and apply effect/quantize.

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daimon
 Post subject: Re: HDRI Problem?
PostPosted: Mon Jun 15, 2009 3:03 pm 
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Quote:
must be a problem with very high exposures (like tiny sunspot) which causes the speckle.

looks like you have to adjust gamma to 2.2 before using the hdr.

if that still leaves speckles download hdrshop and apply effect/quantize.
must be a problem with very high exposures (like tiny sunspot) which causes the speckle.

looks like you have to adjust gamma to 2.2 before using the hdr.

if that still leaves speckles download hdrshop and apply effect/quantize.





It may be the reason I have the spots. I have edit the hdr Image and add more exposure.
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