The main goal with rendering in Cinema 4D is setting up your render with the maximum
amount of flexibility so you only need to render once. In this video,
I'm going to show you how you can use the Cinema 4D Multipass system that allows you
to render out things like reflection passes, shadow passes, ambient occlusion,
as separate passes for full compositing flexibility in apps like Photoshop or
After Effects. So the main goal here is to render out each individual pass that makes
up our rendered image to be able to adjust them, say like the opacity or the
amount of reflection of that reflection pass in either Photoshop or After Effects.
Let's go ahead and setup our Multipass render. So here is that Multipass setting
that I skipped over in the last video. If we check this on,
it will then be utilizing the Multipass workflow. But we first needed to find the
passes that we want to render out separately in addition to our main
rendered image. And here is where we go to the Multipass button and choose which
passes we want to render out. So what I'd like to do is just choose Add
Image Layers. And what this will do is add all of the most common Multipass layers
that you typically render out. Now, for the current render in scene I'm using,
we have a few items here that we're actually not using in our scene.
So things like Post Effects, Atmosphere, Caustics, and Global Illumination are all
settings we do not need, so I'll just select them and delete.
But things like Ambient Occlusion, I do have on my scene,
refraction and reflection, remember because we have our glass bowl,
so we have both refraction and reflection. We have lights in our scene
casting shadows. We actually don't have any specular so we can delete that.
Defuse is basically your color channels of your materials. And ambient is any ambient
lighting in your scene. So the one thing to note about ambient
occlusion is that you need to uncheck this Apply to Project for it to render out as a
separate pass and not be baked in to your main image render, okay?
So one important setting there. Another thing to note is that if you have
items like depth of field or movement, and you want to render out a motion vector
pass to add motion blur in After Effects, you'll want to enable the Depth,
as well as the Motion Vector. So those are the most important passes.
And let's just quickly set up our depth in our camera settings.
So I'll just go and choose depth of field front blur and back blur,
and just adjust these little handle bars here. And now let's test out and see what
this render looks like. So I have my multipass settings setup.
Let me just copy and paste that file render path from my regular image, which
is my main beauty pass and my Multipass images. And we'll just save them
to desktop. Again, we can change what format we want. I'll just change this
to PNG as well. And let's go in Render to Picture Viewer. I'll just save over this
other file. And what you're going to notice is that we have our main Beauty
pass here showing up in our picture viewer. And let me just make this
fairly large. And you currently can't see any of these render passes.
Now, to see the render passes, we need to go into this layer tab and
choose Single-Pass. And then what I can do then is click on each of these individual
passes to see what they look like. So here's our ambient occlusion pass.
You can see we have the little bit of ambient occlusion shading right down here.
Here, we have the reflection pass, so nice reflections.
And this is great to have all of these individual passes.
There's our shadow pass, our diffuse,
there's our motion. Since we don't have a lot of motion, there's not going to be any
kind of motion vectors in here. And here's our depth,
it's represented as a black and white gradient. But the great part about having
all of these items in separate passes is that we can control the level of, say,
reflection on our objects in After Effects or Photoshop. So for an example,
I can go into my Multipass setting here and choose my reflection,
and just bring down the overall strength of my reflection level. And again,
this is where that full flexibility comes in where, say a client's like,
"You know what? I love this mage. But let's just pull back on the reflection
just a little bit." Say we're in Photoshop and we have this as a layer,
we can just bring down the opacity of that reflection layer to a certain amount
without having to re-render out of Cinema 4D. And that's the main point is you want
to check twice, render once, because the Multipass system allows for that
flexibility to be able to render out one side of Cinema 4D and have full control
of the amounts of effects as layers inside of a compositing app like Photoshop or