This model tests the various alpha modes available in glTF 2.0. There are three settings for alphaMode: "OPAQUE" (the default), "BLEND", and "MASK". Of these, "MASK" takes an additional alphaCutoff value that modifies it.

通过模型的处理软件，设置材质（material）的属性，能够使模型在引擎中显示时，将透明的位置不显示，从而达到正确的显示方式： 具体的操作方式参见之前公众号文章：Blender导出带透明贴图的gltf模型.

The glTF Specification makes use of common engineering and graphics terms such as image, buffer, texture, etc. to identify and describe certain glTF constructs and their attributes, states, and behaviors. This section defines the basic meanings of these terms in …

1 天前 · glTF™ 2.0 Specification GLTF ™ 2.0规范 The Khronos® 3D Formats Working GroupKhronos ® 3D格式工作组version 2.0.1, ... MASK- The rendered output is either fully opaque or fully transparent depending on the alpha value and the specified alpha cutoff value; ...

glTF官方没有给出相关的约束和规范。 但是官方也给出了在不同情境的一般处理分为三种情况： 有TANRENT和NORMAL的情况下，按照正常的光照模型和法线贴图进行渲染。

2024年3月14日 · glTF是Khronos提出的一种3D内容格式，可以支持3D模型、3D动画，不过本文不会涉及和动画有关的内容，也不会涉及PBR材质。 SketchFab上的模型都提供 .glb 或 .gltf 格式下载。

Alpha masked rendering mode for GLTF materials, used with PRIM_GLTF_BASE_COLOR. Transparency from the texture is compared to the material's alpha cutoff, with pixels above the cutoff fully opaque and pixels below it fully transparent.

2020年6月21日 · I’ll search how to modify the material after loading the GLTF file. Or you can do it by setting “alphaCutoff” > 0 and “alphaMode” = “MASK” in “materials” property on .gltf file. Like this: Go to Material properties → settings → set “Blend Mode” to “Alpha Clip” and set “Clip Threshold” to something > 0, (for example 0.5).

Mask = 2, Blend = 3, The alpha rendering mode of a material. The alpha value is ignored and the rendered output is fully opaque. The rendered output is either fully opaque or fully transparent depending on the alpha value and the specified alpha cutoff value. The alpha value is used, to determine the transparency of the rendered output.

This model tests the various alpha modes available in glTF 2.0. There are three settings for alphaMode : "OPAQUE" (the default), "BLEND" , and "MASK" . Of these, "MASK" takes an additional alphaCutoff value that modifies it.