In Blender, a sudden change of colours is happening in my render. Why?

Use this forum for general user support and related questions.
Forum rules
Please upload a testscene that allows developers to reproduce the problem, and attach some images.
wasd
Posts: 319
Joined: Tue Apr 24, 2018 7:20 pm

Re: In Blender, a sudden change of colours is happening in my render. Why?

Post by wasd »

Dade wrote: Fri Dec 28, 2018 4:02 pm I'm looking at your scene and it works fine if I replace the "mattetranslucent" material with matte
I see no point in replacing mattetranslucent with matte, the problem is with translucent materials.
Dade wrote: Fri Dec 28, 2018 4:02 pm It is pretty much impossible to check if the hundreds of leafs are "well formed" for me, can you reproduce the same problem with just a single cube ?
Not right now. But in every scene I have that problem. Maybe camera volume is not bugged, it is them practically useless.

That's a perfectly formed sphere. Beside tree:
leaf-2.png
By itself:
leaf-3.png
leaf-3.png (9.53 KiB) Viewed 3645 times
Attachments
camvol_bug.zip
(2.92 MiB) Downloaded 170 times
CPU Bidir + Metropolis | Core i5-4570
happysmash27
Posts: 20
Joined: Sun May 06, 2018 2:36 am

Re: In Blender, a sudden change of colours is happening in my render. Why?

Post by happysmash27 »

After doing CPU rendering after an update, the change now appears between frames 591 and 592.
happysmash27
Posts: 20
Joined: Sun May 06, 2018 2:36 am

Re: In Blender, a sudden change of colours is happening in my render. Why?

Post by happysmash27 »

Update:

It seems that for some reason, OpenCL kernel compiling suddenly takes an insane amount of time. In other news, however, rendering the same frame does, indeed, give wildly different results on OpenCL and CPU rendering:

Image
User avatar
Dade
Developer
Developer
Posts: 5672
Joined: Mon Dec 04, 2017 8:36 pm
Location: Italy

Re: In Blender, a sudden change of colours is happening in my render. Why?

Post by Dade »

happysmash27 wrote: Fri Jan 18, 2019 7:04 am Update:

It seems that for some reason, OpenCL kernel compiling suddenly takes an insane amount of time. In other news, however, rendering the same frame does, indeed, give wildly different results on OpenCL and CPU rendering:
It looks like an NVIDIA OpenCL driver bug: sometime the break stuff, it has happened already multiple times, you can try to install the latest driver and than go back, looking for a working driver.
Support LuxCoreRender project with salts and bounties
happysmash27
Posts: 20
Joined: Sun May 06, 2018 2:36 am

Re: In Blender, a sudden change of colours is happening in my render. Why?

Post by happysmash27 »

I use an AMD RX 480, not a Nvidia card.
wasd
Posts: 319
Joined: Tue Apr 24, 2018 7:20 pm

Re: In Blender, a sudden change of colours is happening in my render. Why?

Post by wasd »

Did you try to disable Auto-Detect Camera Volume?

CPU render

Auto-Detect Camera Volume:
591
a0591.jpg
592
a0592.jpg
Camera Volume Disabled:
591
0591.jpg
592
0592.jpg
It's not some "malformed mesh geometry" problem. What can possibly be "malformed" in a bunch of parallelepipeds?
CPU Bidir + Metropolis | Core i5-4570
Post Reply