Global Illumination Issue – Big stains and splotches

[Darby Edelen]

I didn’t see any problems rendering your scene here. Have you made any progress finding a solution?

Darby Edelen

[Corrado Carlevaro]

Did you render the whole (something like 50, 100 frames) scene? Would you mind telling me your system configuration?
No progress at all, I rebuilt the whole scene from scratch many times but it’s always happening, actually I just open a Lighting preset by Tim Clapham, put the cubes inside and get stains.

Corrado

[Adam Trachtenberg]

As I see it, you have several choices:

1. Save out the scene with different render settings so you’re only rendering out smaller chunks of frames (use batch render to produce the whole); or

2. Use the physical renderer instead of standard. It produces a better result and in this case isn’t much slower … if you can live with a little grain; or

3. Get vRay for C4D; or

4. Keep banging your head against the wall trying to get standard GI to work.

[Corrado Carlevaro]

Point 4. is the one that most suits me. On the other hand I could quit GI, or I could quit that project, or I could quit 3D all around and learn fishing 🙂

3.I tried Vray for C4D but it’s too complicated (those stupid cubes don’t need to be “realistic”).

2. Physical render is giving me the same stains (pure QMC seems to work better)

1. I’ll try that way

0. I’ll keep bothering helpful people like you asking for advice

Corrado

[Adam Trachtenberg]

You shouldn’t have any problems with physical renderer, but remember that it’s not just a matter of selecting it. You also have to turn off the standard GI effect and enable GI in the physical render settings.

[Corrado Carlevaro]

you were right: 30 frames, physical render, standard settings, no stains; grainy but not so slow, considering there’s no prepass time; so I assume it’s a IR bug

[Darby Edelen]

I rendered using the settings in the file you posted as-is, which I believe was set to output frames 48-100.

I noticed that the image you posted looks like it has some textures that may not have come through in the project file you posted. If that’s the only difference between the files perhaps that’s a place to start?

I’m working with Cinema 4D R13.061 on Mac OS 10.7.5.

Darby Edelen

[Corrado Carlevaro]

It had some background textures, I stripped everything down to Light, Sky, cubes (cylinders, actually, which material is only a pure white Color Channel with Oren-Nayar model), rendered, got stains, uploaded; then opened a brand new file, put inside the Lighting preset by Tim Clapham, cubes, got stains; then opened the Lighting preset, put inside cubes, got stains. As I said I’m the kind of guy who bangs his head against the wall trying to make things work but now I give up, thank you for your time.
I’m working with C4D Studio 14.034 Windows 7.

C.

[Darby Edelen]

Perhaps the problem is in R14? Seems unlikely but possible.

Darby Edelen

[Corrado Carlevaro]

I just did a 30 frames render, same settings an stuff but with a much more complex and editable geometry and with a more complex material (which was the original goal) and it looks like I have no stains. So, could it be a primitive object issue? Now I just started the whole render, I’ll let you know