Compositing Tag.

[milanm]

@Oleg

There are many many ways to do that depending on how much control you want. The one below is my personal favorite. Few checkboxes and ObjectTags. I'm not even using render masks so it all renders in one pass. Much easier to setup than Compositing Tag and it gives you much more options in post. Also, no headaches about what light is assigned to what piece of geometry in a big scene. You can reuse the same setup in Ae, Fusion or Nuke for different products instead of dealing with individual pieces of geometry every time in every scene. It's easier to adjust intensity or even color of each light/reflection... etc.



C4D Scene

Lightpasses.zip

(5.02 MiB) Downloaded 387 times

PSD

Lightpasses-FinishedComp.zip

(21.45 MiB) Downloaded 338 times

Regards
Milan

[andrefry]

Thanks milanm. Very helpful.

A few questions if that’s cool ?

How did you get light pass 4 to look like this ? Did you do post work on it in PShop ?



How did you get around not using render masks ? You have them in PShop file so I’m confused ?

Cheers.

Light Pass 4 -

[andrefry]

I rendered your scene with your render settings. Here -
But I also switched on Diffuse / Reflection in Beauty Passes.

[Oleg]

@milanm

WOW, that's interesting, thank you alot for that tip! Very clever

[milanm]

Hi andrefry

I'm currently extremely busy to go into more detail but maybe screenshots could clarify things a bit.

How did you get light pass 4 to look like this ? Did you do post work on it in PShop ?

There are four lights in that scene. I'm using separate lights in order to get reflection and diffuse light separately. That's how i can get a lightpass with reflections only.
There are other ways, using reflection and diffuse passes but it was easier for me this way. Also you can do some interesting things using that trick even without using passes so I was just anxious to show it to someone.

How did you get around not using render masks ? You have them in PShop file so I’m confused ?

Pay attention to how object tags are setup in that scene. I'm using object layer color to make a single pass that contains 3 masks, each in a separate RGB channel. In the PSD file I just created variations to show what can be done with them. I just copied each channel and used it as a layer mask.

Regards
Milan

[miohn]

Hi MIlan,

interesting workflow!

I've got one question:
why do you save multipass in c4d-multipass and not in Octane?
I thought we've adviced not to use the c4d multipass saving.

Is there any reason for this?


thanks
Mike

[milanm]

Hi Mike

Yes, you're right, that is not recommended. The only reason I used it was because layers were arranged the way I needed them by default in PSD. LV was saving an ugly 8bit mess and I was in a hurry. Also I work in scene linear untonemapped and didn't need alpha.

Regards
Milan

[wecandance]

it might be a bit off-topic but since you mentioned it please allow this quick side question:

The octane multipass file dialog does not save any images when rendering with picture viewer. (render passes enabled, C4D save dialogs enabled or disabled does not matter).
I am fairly new to Octane so here's the question(s):
Is this expected behaviour? Do I need to check some hidden box somewhere? Are you familiar with the phenomenon?

[aoktar]

it might be a bit off-topic but since you mentioned it please allow this quick side question:

The octane multipass file dialog does not save any images when rendering with picture viewer. (render passes enabled, C4D save dialogs enabled or disabled does not matter).
I am fairly new to Octane so here's the question(s):
Is this expected behaviour? Do I need to check some hidden box somewhere? Are you familiar with the phenomenon?

Please read my answer to your another post!

[Bolos]

Hello there, I'm sorry if my post isn't appropriate as it is a photoshop related one but as I used milanm's great technique, I guessed I'd ask here.

I run in a mask problem in Photoshop.

Here is the colour object ID I made :

But when i group the layers with each object ID channel as a mask,

Screen Shot 2018-03-18 at 18.16.11.png (10.36 KiB) Viewed 5488 times

I get some edge noise like this :

Is there something wrong with my technique ?

I can provide files if anyone is interested in helping me.

Thanks in advance.

Edit :

Never mind, I also asked on stackexchange and found a solution.

For those having the same problem, here is the link.