LuxCoreRender Forums

Hi
(attached png and blend file)

Could you please tell me why the world light is coming from the left (x axis). I think everything in the scene is centered.

Thank you

I think the normalmap is causing this.
Can you attach it (or pack into the file)?

When I render it looks like this:

Packed file attached.
Thanks

yup, caused by normal map...
from my experience, using normal map with Height above ~ 0.3 (gamma 2.2) i always get some sort of shading issues / gamma 1 looks fine

PS
really in need for displacement

Great. Thank you for the info.

With Cycles I get the attached result.
Even though the cracks look different, the shadow is also falling to the right, so I think the normalmap is not correct (or it is an optical illusion that only makes it appear as if a shadow was falling to the right).

BYOB

That's interesting. I'll try the scene with different Normal maps and see what happens.

Thanks

Just to say that I'm finding (as Kintux mentioned), that so long as the Gamma is kept at a value of 1 then the problem goes away.
I think I've seen an article about reasons for setting gamma values to 1 or 2.2 somewhere else, possibly on the older Luxrender forum. Sorry, but I can't remember where!
I hope the above make sense.
Cheers, and thank you both for your help.

Racleborg wrote: ↑Sat Apr 14, 2018 11:07 am Just to say that I'm finding (as Kintux mentioned), that so long as the Gamma is kept at a value of 1 then the problem goes away.
I think I've seen an article about reasons for setting gamma values to 1 or 2.2 somewhere else, possibly on the older Luxrender forum. Sorry, but I can't remember where!

Do you mean you are using gamma correction on an image map used as normal map ? Uh, never, RGB values of a normal map are (X, Y, Z) values of a vector used to "perturbate" the shading normal. They are numbers, normal maps are just a simple trick for encoding data inside an image and, by using gamma correction, you are messing with them. You should never use gamma correction in a normal or a bump map.

Hi Dade

So is this setup incorrect and that the gamma should be set to 2.2? (file attached)
Cheers