If you use two different maps, then the exporter merges them in one map. If you use one of the two maps, then the exporter creates a new map using the provided map and the value of the other parameter.

So during the export the metalness and roughness maps are merged in one map using their respective channel. In 3DS Max, metalness and roughness maps are black and white images (R=G=B).Д«ut in glTF format, the metalness is stored in the blue channel and the roughness in the green one (the red channel is for the occlusion). If both maps are used, they must have the same size to be merged successfully. In the Specular Reflections section, the metalness and the roughness values and maps are supported. Note: it is recommended to always set the base color weight to 1. If you use a map for the base color, then the base color weight is overrided to 1 for the export.ДЄlso if the base color map and the transparency map are used, they must have the same size in order to be merged successfully. In the Basic Parameters and Transparency sections, the base color weight, the base color and the transparency weight values are supported.ДЄnd you can use a map for the base color and the transparency weight (the base color weight map is not supported). When exporting, if a map is assigned to a parameter, the basic parameter value is ignored. Involved parameters are highlighted bellow. The Standard Surface Arnold material is exported to glTF format as a PBR material. Normal Bump map nodes are currently not supported. Connecting a height map may yield to unexpected results. Note that glTF does not support height maps. A tangent-space normal map can be directly connected to the Bump input. The bump map (or normal map) and its weight are used. The diffuse roughness map is used as ambient occlusion. The emission map is assumed to be precomputed. This mean that emisson weight, luminance and Kelvin are not used.

However, the exported emission color map is identical to the specified one in generic map. The exported emission color value is computed based on all 4 parameters: emission weight, color, luminance and Kelvin.

Like for base color and transparency, the basic parameter value is used as default value when binded map is not provided. Note that the duration of this process scales with images size and may have a severe impact on export duration. The 2 maps must have same sizes to be merged successfully. In glTF format, metalness is stored in blue channel, roughness in green. In 3DS MAX, metalness and roughness maps are black and white images (R=G=B). Involved parameters are highlighted bellow and described in the following sections. The physical materials are exported to glTF format as PBR materials. Note that the conversion duration scales with images size and may have a severe impact on export duration.

Standard material (converted to PBR, see below)ДЈDS MAX Standard materials are converted to PBR materials based on their diffuse, specular, opacity and glossiness.

Animations: position, rotation, scaling.

Position / rotation / scaling (from nodes).

Geometry: position, normal, color, texture coordinates (2 channels).

Since the plugin first exports to babylon then converts it to glTF, glTF features are a subset of the babylon ones. The plugin exports to babylon format before converting it to glTF.

3ds max model