phiol

I'm writing to know how or (where to find) an over compositing shader.

By over I mean the equivalent of having two png. fed to two jit.gl.videoplane @blend_enable 1 @depth_enable 0,

then both captured by a gl.node. Then to decide on which is over 

In touch designer, the "over" composite does exactly this but stays 2D.

But what I want would be to find a shader file so I can keep it all 2D gl.pix style.

In the attachment you'll find the workaround I did , but I would like to find the jit.gl.slab equivalent.

https://en.wikipedia.org/wiki/Alpha_compositing

this image is supposed to be called the overlay compositing: 

https://en.wikipedia.org/wiki/Alpha_compositing#/media/File:PorterDuffOverlay.png

Anyways , you'll find in the attachment that I already tried with the jit.gl.slab @file co.overlay.jxs.

I'm writing to know how or (where to find) an over compositing shader.
By over I mean the equivalent of having two png. fed to two jit.gl.videoplane @blend_enable 1 @depth_enable 0,
then both captured by a gl.node. Then to decide on which is over 
In touch designer, the "over" composite does exactly this but stays 2D. 

But what I want would be to find a shader file so I can keep it all 2D gl.pix style.
In the attachment you'll find the workaround I did , but I would like to find the jit.gl.slab equivalent.
According to this  wikipedia article : https://en.wikipedia.org/wiki/Alpha_compositing
this image is supposed to be called the overlay compositing:  https://en.wikipedia.org/wiki/Alpha_compositing#/media/File:PorterDuffOverlay.png

Anyways , you'll find in the attachment that I already tried with the jit.gl.slab @file co.overlay.jxs. 

compositin-over-hack

Find the reason why in the attachment :-)

But still , I would like to know how to do it with an over composite and avoid doing some 3D.

Find the reason why in the attachment :-) 

But still , I would like to know how to do it with an over composite and avoid doing some 3D. 

i like that feedback patch, especially when the blur is 0.

The IMI package has some compositing examples. check it's help file and go to Max103 (tab) > Effect, some compositing stuff (and some slab stuff) there. Not really sure they have what you're looking for, because how i interpret what you want is just simply some op/blend modes in [jit.op]

Stepping out of gl world , woudl be like cheating my girlfriend. Not gonna happen.

But thought maybe I overlooked something.

As mentioned, Touch D has a nd over comp and was wondering if I had overlooked

Jitter having one somewhere. Then I read the overlay definition in that wiki, and knew that

slab had overlay , but slab overlay behaves like photoshop's overlay.

Stepping out of gl world , woudl be like cheating my girlfriend. Not gonna happen.
As for the slab group and gl.shader 
But thought maybe I overlooked something.

As mentioned, Touch D has a nd over comp and was wondering if I had overlooked
Jitter having one somewhere. Then I read the overlay definition in that wiki, and knew that
slab had overlay , but slab overlay behaves like photoshop's overlay. 

jit.gl.pix @gen alphablend or jit.gl.slab @file co.alphablend.jxs

Sorry for the late reply. Actually , alphablend changes the colors of you image.

So it's a no go for my particular context .

Sorry for the late reply. Actually , alphablend changes the colors of you image.
So it's a no go for my particular context .
But thanks for the suggestion 

not sure what you're seeing, but if the alpha value of a particular pixel is full alpha with no transparency, then that pixel won't change its color when alpha-blending.

compositin over (hack)