Render elements rawreflection and rawlighting creating white pixels around silhouette

[jstrob]

when using those render elements I often get white pixels around silhouette. And now I have a scene with a lot of backlights and this is really problematic. I try to choke the alha but it even appear around objects inside the alpha... Is there any way to avoid this? Maybe by using reflection and light passes instead of raw?

[Dariusz Makowski (Dadal)]

Heya

Do you use it in 32 bits/exr ?

Do you multiply diffuse by raw light and reflectionFilter by rawRefl?

Regards

Dariusz

[jstrob]

Yes to all.

In 32 bits exr in linear mode sRGB space in after effects

usinf a simple matte choker on the rawLighting help a lot.

[Rens]

Yeah don't use the raw passes. Divide for example Reflection by Reflection Filter, then adjust, then multiply with Refl Filter again.

[joconnell]

I thought that'd been fixed in 3.x?

[tashko.zashev]

I thought that'd been fixed in 3.x?

Yes, V-Ray 3.x makes this automatically. All raw render elements should work well.

[vlado]

I thought that'd been fixed in 3.x?

Yes, however for this to work, you need to have the raw, normal and filter elements all enabled (i.e. raw GI, GI, and diffuse filter).

Best regards,
Vlado

[jstrob]

Vlado, you mean we must comp for example the rawLighting with the lighting and the diffuse filter? How do we mix them? normally for the lighting pass I just multiply the diffuse filter on the raw lighting and put that in add mode in my comp...

[vlado]

Vlado, you mean we must comp for example the rawLighting with the lighting and the diffuse filter? How do we mix them? normally for the lighting pass I just multiply the diffuse filter on the raw lighting and put that in add mode in my comp...

Eh no, this was in response to Tashko's note that V-Ray 3.0 will do the correct thing. It will do the correct thing if all three elements are present. Otherwise it will be the same as V-Ray 2.x

Best regards,
Vlado

[joconnell]

Ah okay - so it's kind of doing a sneaky divide on the way out and replacing the original raw ref file?

[Dariusz Makowski (Dadal)]

Eh no, this was in response to Tashko's note that V-Ray 3.0 will do the correct thing. It will do the correct thing if all three elements are present. Otherwise it will be the same as V-Ray 2.x

Best regards,
Vlado

So I need light/rawlight/diffuse in order for vray to create proper raw light or can I just have raw light + diffuse?

[tashko.zashev]

In order to get correct raw passes in V-Ray 3 (without manually dividing Lighting/diffuse to get Raw lighting in post), all main render elements should be added as well. So if you going to use raw light, raw gi, raw reflection elements e.t.c. you must add lighting, GI, reflection elements too
Otherwise V-Ray will not be able to calculate proper raw elements and they will be issues in compositing.

V-Ray divides automatically Lighting/Diffuse and saves proper Raw Lighting.

[Rens]

So to avoid confusion, to have VRay automatically create the correct raw passes you would need a full set, correct? For example:
Reflection, RawReflection and ReflectionFilter

Or:
Lighting, RawLighting and Diffuse
GI, RawGI and Diffuse
Refraction, RawRefraction, RefractionFilter

[Dariusz Makowski (Dadal)]

Oh well snap. I didn't know that. I've just assumed that maya v3 only needed raw light + diffuse. Well it might be worth pointing this out somewhere in docs or in warning print or in render element section so that people know that.

Regards

Dariusz

[tashko.zashev]

So to avoid confusion, to have VRay automatically create the correct raw passes you would need a full set, correct? For example:
Reflection, RawReflection and ReflectionFilter

Or:
Lighting, RawLighting and Diffuse
GI, RawGI and Diffuse
Refraction, RawRefraction, RefractionFilter

Yes, that's it.

Oh well snap. I didn't know that. I've just assumed that maya v3 only needed raw light + diffuse. Well it might be worth pointing this out somewhere in docs or in warning print or in render element section so that people know that.

Regards

Dariusz

We will definitely add a note to our documentation about this.