[BUG] Indigo 0.8 stable null material shadows

Zom-B · Post by **Zom-B** » Thu May 17, 2007 11:40 am

Hey Ono...

It seems there is (still) a Bug with the null material in 0.8 stable.
I use a null material blended diffuse material (no bump) Hybrid + BiDir + MTL!

(540 mutations per pixel)

for everybody who can't see this, I raised the contrast in PS.

Here is the Scene File:

***EDIT***
I let the rendering stay over night, maybe this artifact is gone then...
I tried the same scene used diffuse transmiiter at 1000 Muts per pixel,
but no artifacts are visible...

CTZn · Post by **CTZn** » Thu May 17, 2007 12:51 pm

I've noticed that in your earlier post. Just to support your report

Kram1032 · Post by **Kram1032** » Thu May 17, 2007 4:27 pm

and I wrote a possible problem to your earlier post

suvakas · Post by **suvakas** » Thu May 17, 2007 7:29 pm

yep, i get the same kind of thing.

Post by **OnoSendai** » Thu May 17, 2007 8:16 pm

Ok, bug noted, thx.
Nice test scene

You should try doing a blend between phong and diffuse transmitter for the leaves (all blended with a null mat). I think it would look nice.

Kram1032 · Post by **Kram1032** » Thu May 17, 2007 8:22 pm

specular leaves

Zom-B · Post by **Zom-B** » Thu May 17, 2007 8:49 pm

A just rendered the Image for over night for 2200 mutations per Pixel, the bug is still visible...

But by exident I found the following strange shadow issue

OnoSendai wrote:Ok, bug noted, thx.
Nice test scene
You should try doing a blend between phong and diffuse transmitter for the leaves (all blended with a null mat). I think it would look nice.

actually the idea was to do a blend, but using phong for some glossy reflections of the Ivy,
but I just tried diffuse_transmitter only to check the effect first, before blending... but this was the result

BTW Ono, if you like the scene, so just keep it

Post by **OnoSendai** » Thu May 17, 2007 8:50 pm

Oh yeah, I might download it for testing

Kram1032 · Post by **Kram1032** » Thu May 17, 2007 9:52 pm

that difference trick is good for checking

really strange shadow behaviour.

scyguo · Post by **scyguo** » Wed May 30, 2007 10:53 pm

hi
I've noticed same problem - looks like nools alpha bug
set: mlt+bdir+hybrid
env: sunsky

Kram1032 · Post by **Kram1032** » Thu May 31, 2007 12:17 am

are you also using 0.8, scyguo?

scyguo · Post by **scyguo** » Thu May 31, 2007 10:25 am

yes, official stable 0.8 - winxp64pro, latest blendigo mod from Bigfan and blender244

In 0.8 test3 there is another problem with nools alpha - object with blend nool behind another blend nool was invisible. In new official 0.8 this is solved - there is only that strange nools alpha or maybe something else. In my case it's not big problem - five minutes in pshop and done

Kram1032 · Post by **Kram1032** » Fri Jun 01, 2007 2:13 am

Hmmm...

I guess, maybe, it could help, to try different modes:

Try to deactivate Hybrid, I.e....
Maybe, that works.

I hope, Ono finds a solution, soon^^

Post by **OnoSendai** » Fri Jun 01, 2007 3:00 am

Yeah, you can probably work around the bug by turning bi-dir off

scyguo · Post by **scyguo** » Sat Jun 02, 2007 6:53 am

thanks!
It's working - renders are clear with bdir off - needs more time but it is no difference between nools alpha and background
thanks again!

[BUG] Indigo 0.8 stable null material shadows

[BUG] Indigo 0.8 stable null material shadows

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