Correct transfer modes for post? (Multipass from 3D app to AE)

[Andrew Kramer]

Isn’t there a function that already creates a project file that sets this up for you automatically? I would check into this in the render settings.

ANdrew

[Mylenium]

Just see to it that you also create an After Effects project file from within C4D and that will setup all of it automatically for you once you open it in AE. That aside there is no general recipe for which blendmode is right for which rendering component (though obviuously you wouldn’t wanna use e.g. shadow passes with additive blending), it all depends on what look you are after. In addition to that you will many times use modified duplicates of the same componenent like e.g. blurred specular passes to create blooming and soft glow, which can also force you to adjust the “pure” passes to compensate.

Mylenium

[Pour Myl

[Shane]

Thanks for the info. I created a quick static image using multipass and opened it in photoshop just to see which modes were used, and the only one that was different was specular. It was in linear dodge mode. I normally see it in add or screen.

Thanks for explaining it. I guess it all depends on what I am trying to create and how I want it to look.

Thanks

[Filip Vandueren]

Linear Dodge is Photoshop’s alternative to “Add”, it does not have a true add.
I’m not sure if mathematically the two are equivalent, but for colours that aren’t too saturated, it sure looks similar to me.

[Chris Smith]

Usually Specular is ‘added’ over diffusion. AO and Shadow passes are ‘multiplied’ over.

Chris Smith
https://www.sugarfilmproduction.com

[Rick Dolishny]

C4D exports AE files? That’s amazing.

I’m using Lighwave and it’s definitely less developed.

Can any one recommend a DVD or training video that goes over the importances of which render buffers are ‘must have’, the stacking and transfer orders of these buffers. Lighwave gives you some buffer layers but already I’m noticing some need to be inverted and there is no indication of what layers are important to re-create the composite.

Thanks!

– Rick

—
Rick Dolishny
Discrete Editors COW Leader
http://www.thecreativeprocess.ca

[Steve Roberts]

Hi Chris — speaking generally:

[Chris Smith] “Usually Specular is ‘added’ over diffusion.”
… because the stuff we want to see is lighter than the diffusion pass?

[Chris Smith] “AO and Shadow passes are ‘multiplied’ over.”
… because the stuff we want to see is darker than the diffusion pass?