FlatShading on MeshLambertMaterial

[Astrak]

The shading property has been removed from MeshLambertMaterial, it is only rendered the SmoothShading way.

Is it the desired effect ? Phong looks heavier to get this result.

[codeka]

Is there any update here? I noticed #9222 got merged recently, is that the way to go about this?

[WestLangley]

@codeka Yes, if your geometry is THREE.Geometry, you can call

geometry.computeFlatVertexNormals();

and achieve flat shading when using MeshLambertMaterial.

[looeee]

Added a note to the docs saying that FlatShading won't work for this material.

[jee7]

Currently the note about flat shading not working with Lambert seems to have gone missing from the docs.

One might assume that MeshLambertMaterial with flatShading: true would produce the same result as MeshPhongMaterial with flatShading: true and shininess: 0.

http://jsfiddle.net/__jee7__/0aj5vh9g/16/

As choosing the material class seems to be about how the shading is calculated (what reflectance model is used) instead of where is it calculated (per fragment, vertex or face).

[Mugen87]

Quick update on this topic since THREE.Geometry is now removed.

• If an instance of BufferGeometry is indexed, you can use .toNonIndexed() to convert it to triangle soup and then (re)compute vertex normals via .computeVertexNormals() to achieve a flat shaded effect: https://jsfiddle.net/3sg4ohLr/

@mrdoob We might want to consider to move flatShading to only those materials who actually support it (and not have it in Material). Except for that, I would not change shader code nor introduce a new geometry class.

[mrdoob]

@mrdoob We might want to consider to move flatShading to only those materials who actually support it (and not have it in Material).

That sounds good to me 👍