[Bf-compositor] Question regarding changes to blending modes

[Troy Sobotka]

On Jun 6, 2014 5:23 PM, "Sean Kennedy" <mack_dadd2 at hotmail.com> wrote:
> I've always thought that blending modes were a defined calculations, so
they'd be the same everywhere (Blender, photoshop, after effects, nuke,
everything...).

They are not.

By default, Photoshop sets a unity at 1.0 and assumes all display referred
blend modes.

Nuke by default assumes scene referred blend modes, with no unity point.
This can cause a little confusion to PS folks, especially where max() is
used instead of 1.0, and leads to irregularities less than <1.0 for display
referred imagery.

Nuke offers a “video space” toggle to use the display referred equivalents.

Blender should, also being scene referred, use scene referred blend modes,
with an optional toggle to use the display referred form.

All scene referred and HDR compositing is bogged up using the defaults.

With respect,
TJS
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