Implementing the KHR_materials_volume extension
The KHR_materials_volume extension adds volumetric effects to the glTF 2.0 ecosystem, enabling the creation of materials with depth and internal structure. It’s crucial for accurately rendering materials such as smoke, fog, clouds, and translucent objects.
Volumetric effects are different from surface-based materials. While surface-based materials focus on how light interacts with a surface, volumetric materials describe how light moves through a medium. This includes simulating how light scatters and gets absorbed as it passes through the volume.
To create realistic volumetric effects, the KHR_materials_volume extension needs to work alongside other extensions that define light interactions with the material’s surface. The KHR_materials_transmission extension is key here, as it lets light rays pass through the surface and enter the volume. Once inside, the light’s interaction with the material is no longer affected...
