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GLTF export: use ORM texture for occlusion/metallicRoughnessTexture if it exists

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nikitalita
2025-10-21 10:33:56 -07:00
parent 7d7d479162
commit ec9711531d
1 changed files with 16 additions and 3 deletions
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19
modules/gltf/gltf_document.cpp
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@@ -4427,8 +4427,9 @@ Error GLTFDocument::_serialize_materials(Ref<GLTFState> p_state) {
bool has_roughness = base_material->get_texture(BaseMaterial3D::TEXTURE_ROUGHNESS).is_valid() && base_material->get_texture(BaseMaterial3D::TEXTURE_ROUGHNESS)->get_image().is_valid();
bool has_ao = base_material->get_feature(BaseMaterial3D::FEATURE_AMBIENT_OCCLUSION) && base_material->get_texture(BaseMaterial3D::TEXTURE_AMBIENT_OCCLUSION).is_valid();
bool has_metalness = base_material->get_texture(BaseMaterial3D::TEXTURE_METALLIC).is_valid() && base_material->get_texture(BaseMaterial3D::TEXTURE_METALLIC)->get_image().is_valid();
Ref<Texture2D> original_orm_tex = base_material->get_texture(BaseMaterial3D::TEXTURE_ORM);
GLTFTextureIndex orm_texture_index = -1;
if (has_ao || has_roughness || has_metalness) {
Dictionary mrt;
Ref<Texture2D> roughness_texture = base_material->get_texture(BaseMaterial3D::TEXTURE_ROUGHNESS);
BaseMaterial3D::TextureChannel roughness_channel = base_material->get_roughness_texture_channel();
Ref<Texture2D> metallic_texture = base_material->get_texture(BaseMaterial3D::TEXTURE_METALLIC);
@@ -4546,19 +4547,31 @@ Error GLTFDocument::_serialize_materials(Ref<GLTFState> p_state) {
}
orm_image->generate_mipmaps();
orm_texture->set_image(orm_image);
GLTFTextureIndex orm_texture_index = -1;
if (has_ao || has_roughness || has_metalness) {
// If they all share the same path, use it for the name.
const String path = common_paths.size() == 1 ? *common_paths.begin() : String();
_set_material_texture_name(orm_texture, path, mat_name, "_orm");
orm_texture_index = _set_texture(p_state, orm_texture, base_material->get_texture_filter(), base_material->get_flag(BaseMaterial3D::FLAG_USE_TEXTURE_REPEAT));
}
} else if (original_orm_tex.is_valid() && original_orm_tex->get_image().is_valid()) {
has_ao = true;
has_roughness = true;
has_metalness = true;
Ref<Image> orm_image = original_orm_tex->get_image();
orm_image->decompress();
orm_image->convert(Image::FORMAT_RGBA8);
_set_material_texture_name(original_orm_tex, original_orm_tex->get_path(), mat_name, "_orm");
orm_texture_index = _set_texture(p_state, original_orm_tex, base_material->get_texture_filter(), base_material->get_flag(BaseMaterial3D::FLAG_USE_TEXTURE_REPEAT));
}
if (orm_texture_index != -1) {
if (has_ao) {
Dictionary occt;
occt["index"] = orm_texture_index;
mat_dict["occlusionTexture"] = occt;
}
if (has_roughness || has_metalness) {
Dictionary mrt;
mrt["index"] = orm_texture_index;
Dictionary extensions = _serialize_texture_transform_uv1(material);
if (!extensions.is_empty()) {
@@ -4583,7 +4596,7 @@ Error GLTFDocument::_serialize_materials(Ref<GLTFState> p_state) {
// Code for uncompressing RG normal maps
Ref<Image> img = normal_texture->get_image();
if (img.is_valid()) {
Ref<ImageTexture> img_tex = img;
Ref<ImageTexture> img_tex = normal_texture;
if (img_tex.is_valid()) {
img = img_tex->get_image();
}