Node: Add FilmNode.

[Mugen87]

Related issue: -

Description

This PR adds FilmNode and migrates misc_controls_fly to WebGPURenderer. Since misc_controls_fly is no webgl_* example and uses post processing, it's better to update it than creating a new demo.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

Filesize dev	Filesize PR	Diff
682.2 kB (169 kB)	682.2 kB (169 kB)	+0 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

Filesize dev	Filesize PR	Diff
459.4 kB (110.9 kB)	459.4 kB (110.9 kB)	+0 B

[sunag]

@Mugen87 I made some changes:

• 1. intensityNode = null - In this case there will only be the calculation if the user adds the optional parameter.
• 2. I removed the grayscale, I think that with TSL this becomes unnecessary since the user will be able to make connections with other nodes, for example: scenePassColor.film().saturation( 0 )
• 3. nodeProxy - will apply nodeObject() to all parameters

[Mugen87]

Agreed! It makes sense to rethink the API since the material handling is different compared to the previous approach. Besides, I'm all-in for focusing the effects on the most important features. The grayscale option was always a bit of a gimmick.