NodeMaterial: Introduce outputFinalNode

[RenaudRohlinger]

Introduce an enhancement to the material node system by adding a new node outputFinalNode that operates at the very end of the pipeline, post tone mapping, fog, and color space adjustments.
This addition unlocks the capability to apply custom effects on a per-material basis, providing a level of control and customization not achievable with a uniform post-processing setup.

Currently the only operation possible is mix, if possible it would be better to be able to apply any operator using tslFn, for example:

material.outputFinalNode = tslFn( ( { color } ) => {
    return color.rgb.addAssign(vec3(0.1));
} )

[sunag]

I think we have already implemented this feature #26419 and here #27239 a update.

[RenaudRohlinger]

Oh! So that was output, even better. I see thanks 👍

[RenaudRohlinger]

@sunag shouldn't the output property return the final output, post toneMapping, fog and colorSpace?

[sunag]

@sunag shouldn't the output property return the final output, post toneMapping, fog and colorSpace?

It should return, because it is the total result.