Normal Mapping artifacts....

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Normal Mapping artifacts....

Post  EasternMerchant on Wed Aug 12, 2009 3:54 am

I converted this grayscale image

using crazybump

to a normal map

then I uploaded the normal map into fryrender

Applied the suggested settings

And rendered the material scene which exposed some artifacts.

I continued to render the scene which also shows some artifacts


Is there a way to prevent this problem from occuring?

Thankyou for your time

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Re: Normal Mapping artifacts....

Post  jorari71 on Sat Aug 29, 2009 3:36 pm

Hi!

First of all excuse me because I couldn't answer you before...I've been very busy with my last 3D job.

Have you tried it with less bump level? I've watched that you have set the bump level up till the 100%...Try to reduce the bump level.

By other part, the non disered normal mapping in the corners logically is translated into a bump level...You should fix this variation in the normal mapping before applying the bump level...

It's a good new to watch that in the material preview we can detect the problem before, can't we?

Regards.
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Re: Normal Mapping artifacts....

Post  javigon on Thu Apr 29, 2010 10:15 pm

Hi,
Crazybump does a grat job converting to normalmap, bot in this particular case you are trying to use a normalmap not cleaned.
You can see in the corners some variations, and outside every circle. And not all circles are the same. You can try to crop it in Photoshop to one circle, clean the corners an make it seamless. Then in fry repeat the texture x 2, x4...
You have to see the RGB to XYZ rellation of your map. Fryrender uses R=X, G=Y, B=Z if I´m not wrong.
For the bump value, normaly in normalmapping the best value is 100, but it is not allways 100. Try to use less or mor. It deppend of how you create the NM.
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