[Bf-committers] Please add invert green channel option in Normal Map node

[Adriano Oliveira]

@Mike

Cycles bake already has a toggle like this for export. We need this in
Normal Map node to deal with NM textures baked for DirectX.

Game engines like Unity and Unreal have an "invert green (y) channel"
option in texture properties.

In my workflow, for instance, I model and animate in Blander, texture in
Substance Painter and render in Unreal. In Painter I export Normal Map
textures to Unreal with DirectX standard (inverted green channel in
relation do OpenGL standard). If I need to see my model with this texture
in Blender, I have to create a node setup to invert G before feeding Normal
Map node.


*Adriano A. Oliveira*
Professor Adjunto do Curso de Cinema e Audiovisual
Universidade Federal do Recôncavo da Bahia (UFRB)
Centro de Artes Humanidades e Letras (CAHL)
Matrícula: 1673892
(71) 99181-0123 [VIVO] / (71) 99146-8523 [TIM]

2017-04-15 15:01 GMT-03:00 patrick boelens <p_boelens at msn.com>:

> I actually just ran into a case where I wanted to compare the custom
> normals I set up in Blender to those inside another app, so there is a
> use-case for real-time toggling as well.
>
>
> No idea how prevalent it is and whether it's worth the effort though, but
> figured I'd chime in.
>
>
> Cheers,
>
> Patrick
>
> ________________________________
> Van: bf-committers-bounces at blender.org <bf-committers-bounces at blender.org>
> namens Mike Erwin <significant.bit at gmail.com>
> Verzonden: zaterdag 15 april 2017 04:49:08
> Aan: bf-blender developers
> Onderwerp: Re: [Bf-committers] Please add invert green channel option in
> Normal Map node
>
> On Fri, Apr 14, 2017 at 10:47 AM, Adriano Oliveira <adriano.ufrb at gmail.com
> >
> wrote:
>
> > I just miss one little thing: An check box option to invert textures'
> green
> > chennels in the Normal Map node.
> >
> > This is very important because Blender follow the OpenGL norms for Normal
> > Map, but other softwares that may be integrated within a pipeline (like
> > Unreal) uses DirectX norms.
> >
>
> Is this only needed during import & export, or something you would toggle
> during the Blender session?
>
> Mike Erwin
> musician, naturalist, pixel pusher, hacker extraordinaire
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