[Bf-committers] Multiview branch feedback

[Adriano Oliveira]

So...?

Adriano


2013/6/11 Adriano Oliveira <adriano.ufrb at gmail.com>

> Hi Dalai,
>
> I would like to contribute with some feedbacks to your branch from a
> user’s point of view.
>
> First of all, congratulations for the initiative and for the outcome so
> far. It is a remarkable achievement, no doubt.
>
>
>
> *What I like the most:*
>
> -          Now it is possible to render Left and Right views from two
> cameras in the same scene!
>
> -          These two views are treated as layers or meta layers and can
> be saved as channels in EXR 2.0!
>
> -          It is possible to preview the two views as composites
> (anaglyphs, side by side…) in 3d viewport, what is great for animators.
>
>
>
> In my humble opinion, the problems are related to the fact that the very
> implementations that allow stereo preview in 3d viewport are leading to
> lack of control in Image Editor and Composite. To be more specific:
>
>
>
> *What I am not sure of and proposals:*
>
> -          The same approach that allows previewing stereoscopy in 3d
> viewport is not as useful in Image Editor (render outcome) and Composite. I
> think it is better that Image Editor only shows stereo images as long as
> they have been composed in Composite as such.
>
> -          For that reason, I would remove the “3-D” option in “Select
> View”. Better: In Image Editor I would remove this new “Select View”, for
> it leads to confusion when dealing with Composite outputs. Even though it
> may seams repetitive, it is more correct and informative to add the views
> ids in the old “Select Pass”, by adding suffixes: Composite.Left;
> Composite.Right; Z.Left; Z.Right… These suffixes should be added whenever
> the user activates L or R views in Render Views.
>
> -          In consequence, stereo automated previews shoud not be a UI or
> Blender Window general option in Preferences, but an option only related to
> a single 3d Viewport, in the very Viewport.
>
> -          In Composite, Render Layers nodes are lacking a switch for
> choosing Left or Right, like Image nodes already have. Both should offer
> Left and Right switches, and…
>
> -          Render Layers and Image nodes should NOT offer a “3-D” switchfor it is not useful in Composite and leads to confusion. 3-D is not a
> channel within Render Layer or Image, it’s just a fast composition option
> of two layers, based on generic parameters.
>
> -          It is more logical to get stereo outcome composing Left and
> Right in a new “Stereo Node”, that would offer: 02 inputs (channels from
> toggled L / R Render Layers or Image nodes), 01 selector with presented
> stereo modes (side by side, over under…); 01 input numerical parameter for
> convergence correction; 01 composed stereo image output.
>
>
>
> Very important: this Stereo Node is only for final composed output files
> (PNG, TIFF) and Movies. We need to implement another new node for
> “optional” re-merging the decomposed L/R views for output as channels in
> Composite (for editing stereo in Sequecer, for instance) or as
> channels/layers in EXR 2.0 files.
>
> This logic of decomposing layers to better work with them, and then
> merging them together later with a new “Merge Channel” or “Merge Pass” node
> is similar to what Nuke already does. This only would be (stereo aside) a
> great implementation in Blender Composite, and must in EXR 2.0 logic.
>
> I hope to help.
>
> Adriano A. Oliveira
>
>