[solved] Help! PrincipleBSDF horrible rendering error in realtime viewport

Like this, just a single principle node to output.

It only happens on horizontal surface. I don’t see anything wrong in any tutor or intro video. I tried some pref settings and no luck
diffuseBSDF works well, other cycles or BI material in realtime viewport also no problem, just principleBSDF
Thanks

You might post a screenshot of your nodes or a link to your blend file. This doesn’t tell us much.

There is nothing worthy posting, just a principleBSDF, all default, I mean all, a cube, a material, nothing else, just a downloaded fresh daily build 64bit 2.78


its a daily build. those things arent even supposed to work.

whats your GPU?

Try 2.79 RC1 or 2.78c. If it still doesn’t work, then you’ve got a real-life problem. If it does work, well… what can I say? :wink:

Yup. Using latest build, can observe something similar but only occasionally (@ some angles, ie. 0°, 80°…) using Material Shading View.
Can’t pinpoint it.

eg.
http://i.imgur.com/cRtFafM.jpg

@taki, Could you report the problem?
Share that .blend file, no matter how simple it is. Mention that this happens in Material View.
https://developer.blender.org/
Top Left, “Report Bug” button.

Edit:
This is reproducible all the time with this file for me:
http://pasteall.org/blend/index.php?id=47123

Edit 2:
Reported:
https://developer.blender.org/T52001

YAFU
:slight_smile: using your file i get no issue, even if creating more of principle shaded objects… :confused:
seems it only appears on fresh creation - new file

have also noticed, artifacts appearing mainly (99’9%) on top/bottom planes (perpendicular to Z axis)
ie. test with icosphere shows no problem at first, but after modifying the pole (translating max/min vertices on Z axis) to create flat surfaces (top & bottom), issue reappears

ps
today’s win64 bild (3361f21)

@burnin, It is still reproducible all the time for me on Linux, hash: 3361f2107b9 :frowning:
The idea is that the user who discovers the problem is the one who reports the problem. Users should get used to doing this, it’s how OpenSource works. But 2.79 is close so there is no time to lose, I will report it and share the report link here.

Edit:
https://developer.blender.org/T52001

Thanks YAFU… it’s fixed in today’s win64 build (ba256b3)
Tested & all looks fine on win7x64.
:smiley:

@ taki
can you also confirm if it’s fixed on your side, then mark thread as SOLVED :wink:

Hey burnin! Yes, artifacts problem was quickly fixed by Brecht.

But other thing… I sucks with nodes :slight_smile: Could you try this?
http://pasteall.org/blend/index.php?id=47140

It occurred to me to connect Principled shader in that way (I’m not even sure that this is a valid way to connect them). The texture disappears in some angles. If you connect Glossy node in the same way, this is not behaving in the same way as Principled.

I’m pretty sure that’s an incorrect way to connect them. What surprises me is that it behaves differently than Glossy.

Edit:
And what about Bump node?.. It seems weird too:
http://pasteall.org/blend/index.php?id=47141

Edit 2:
I have mentioned this also in the report just in case this is not pure mistake of mine.

Both examples behave similar here. Had observe smthng alike before.
Suppose mentioning or asking a question on the report link is OK. Maybe just to get an answer from the developer’s side. :confused:

Honestly I don’t know, never did explore why. As i understand BI viewport is still superior to Cycles’s and i rarely use BI, i simply turn on Cycles for preview (shift+z). So it’s fine for now. Even if weird or a bit bothering, at least something can be observed.
Patiently awaiting the Eevee :eyebrowlift:

PS
Flies and mosquitoes… bugs will always be present just be careful with your ‘passion to kill’ for sooner or later it will drive you into the same shit hole.

Sorry, I should have mentioned what I see in material view. I do not mean artifacts this time, but differences and some weird things when orbit view. For example with the first file:
Principled:
http://pasteall.org/pic/show.php?id=117104

Glossy:
http://pasteall.org/pic/show.php?id=117105

Edit:
Wow, using Rendered view (Shift+Z), Glossy node connected is the one that looks weird when orbit view (Material view looks good with glossy). On the contrary, Principled looks fine in Rendered view (not in material view). All this is really weird, perhaps an invalid way of connecting those nodes.

Yup, same views… i rarely work with normals so i tend to skip a thought :smiley: work with UVs

Hi thanks a lot. I know these things happen in rapid dev progress so I turned back to BI so sry for the late reply, and today’s build work well great news

blender-2.78-a247b36-win64-vc14.zip

cheers