{ "measured_on": "2026-10-21", "question": "what survives the trip from Blender into Godot through a .blend file, a GLB and an FBX: materials, animations, import-hint suffixes, scale and axes", "tool_versions": { "blender": "5.2.2 LTS", "godot": "4.7.2-stable (official)", "fbx_importer": "ufbx (Godot's default since 4.3)" }, "method": { "test_scenes": "built by scripts/make-godot-test.py; the material scene is the one from the Unity measurement, built by the same code", "exports": "Blender File > Export > glTF 2.0 (GLB) and FBX with every setting at its default, plus the variants named in each table", "blend_route": "the .blend file saved into the project; Godot converts it by running the Blender install set in Editor Settings > FileSystem > Import > Blender, with its own default import options", "godot_import": "a project with nothing but these files, imported by the editor in headless mode with every import option at its default", "reading": "scripts/godot/measure_import.gd loads 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"sword" ] }, { "name": "upper_armAction", "length_s": 1.0417, "moves": [ "upper_arm" ] } ] }, "glb": { "label": "GLB, default (Animation mode: Actions)", "loaded": true, "animation_count": 3, "animations": [ { "name": "forearmAction", "length_s": 1.0417, "moves": [ "forearm" ] }, { "name": "swordAction", "length_s": 1.0417, "moves": [ "sword" ] }, { "name": "upper_armAction", "length_s": 1.0417, "moves": [ "upper_arm" ] } ] }, "glb_active_actions": { "label": "GLB, Animation mode: Active Actions Merged", "loaded": true, "animation_count": 1, "animations": [ { "name": "Animation", "length_s": 1.0417, "moves": [ "forearm", "sword", "upper_arm" ] } ] }, "glb_nla_tracks": { "label": "GLB, Animation mode: NLA Tracks", "loaded": true, "animation_count": 0, "animations": [] }, "glb_scene": { "label": "GLB, Animation mode: Scene", "loaded": true, "animation_count": 3, "animations": [ { "name": "forearm", "length_s": 1.0417, "moves": [ "forearm" ] }, { "name": "sword", "length_s": 1.0417, "moves": [ "sword" ] }, { "name": "upper_arm", "length_s": 1.0417, "moves": [ "upper_arm" ] } ] }, "fbx": { "label": "FBX, default (Bake Animation on, All Actions on, NLA Strips on)", "loaded": true, "animation_count": 12, "animations": [ { "name": "forearm|forearmAction", "length_s": 1.0, "moves": [ "forearm" ] }, { "name": "forearm|swordAction", "length_s": 1.0, "moves": [ "forearm" ] }, { "name": "forearm|sword_swing_old", "length_s": 1.0, "moves": [ "forearm" ] }, { "name": "forearm|upper_armAction", "length_s": 1.0, "moves": [ "forearm" ] }, { "name": "sword|forearmAction", "length_s": 1.0, "moves": [ "sword" ] }, { "name": "sword|swordAction", "length_s": 1.0, "moves": [ "sword" ] }, { "name": "sword|sword_swing_old", "length_s": 1.0, "moves": [ "sword" ] }, { "name": "sword|upper_armAction", "length_s": 1.0, "moves": [ "sword" ] }, { "name": "upper_arm|forearmAction", "length_s": 1.0, "moves": [ "upper_arm" ] }, { "name": "upper_arm|swordAction", "length_s": 1.0, "moves": [ "upper_arm" ] }, { "name": "upper_arm|sword_swing_old", "length_s": 1.0, "moves": [ "upper_arm" ] }, { "name": "upper_arm|upper_armAction", "length_s": 1.0, "moves": [ "upper_arm" ] } ] }, "fbx_all_actions_off": { "label": "FBX, All Actions off", "loaded": true, "animation_count": 0, "animations": [] }, "fbx_scene_take": { "label": "FBX, All Actions off and NLA Strips off", "loaded": true, "animation_count": 1, "animations": [ { "name": "Scene", "length_s": 1.0, "moves": [ "forearm", "sword", "upper_arm" ] } ] } } }, { "scene": "anim_shared", "description": "the same three objects keyframed into one action, one slot per object", "blender_actions": [ "idle" ], "routes": { "blend": { "label": ".blend in the project (Godot's default: its Blender export uses animation mode Actions)", "loaded": true, "animation_count": 1, "animations": [ { "name": "idle", "length_s": 1.0417, "moves": [ "forearm", "sword", "upper_arm" ] } ] }, "glb": { "label": "GLB, default (Animation mode: Actions)", 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"forearm" ] }, { "name": "sword|idle", "length_s": 1.0, "moves": [ "sword" ] }, { "name": "upper_arm|idle", "length_s": 1.0, "moves": [ "upper_arm" ] } ] }, "fbx_all_actions_off": { "label": "FBX, All Actions off", "loaded": true, "animation_count": 0, "animations": [] }, "fbx_scene_take": { "label": "FBX, All Actions off and NLA Strips off", "loaded": true, "animation_count": 1, "animations": [ { "name": "Scene", "length_s": 1.0, "moves": [ "forearm", "sword", "upper_arm" ] } ] } } }, { "scene": "anim_armature", "description": "the three objects parented to bones of one armature, one action on the armature", "blender_actions": [ "idle" ], "routes": { "blend": { "label": ".blend in the project (Godot's default: its Blender export uses animation mode Actions)", "loaded": true, "animation_count": 1, "animations": [ { "name": "idle", "length_s": 1.0417, "moves": [ "fore", "hand", "upper" ] } ] }, "glb": { "label": "GLB, default (Animation mode: Actions)", "loaded": true, "animation_count": 1, "animations": [ { "name": "idle", "length_s": 1.0417, "moves": [ "fore", "hand", "upper" ] } ] }, "glb_active_actions": { "label": "GLB, Animation mode: Active Actions Merged", "loaded": true, "animation_count": 1, "animations": [ { "name": "Animation", "length_s": 1.0417, "moves": [ "fore", "hand", "upper" ] } ] }, "glb_nla_tracks": { "label": "GLB, Animation mode: NLA Tracks", "loaded": true, "animation_count": 0, "animations": [] }, "glb_scene": { "label": "GLB, Animation mode: Scene", "loaded": true, "animation_count": 1, "animations": [ { "name": "rig", "length_s": 1.0417, "moves": [ "fore", "hand", "upper" ] } ] }, "fbx": { "label": "FBX, default (Bake Animation on, All Actions on, NLA Strips on)", "loaded": true, "animation_count": 1, "animations": [ { "name": "rig|idle", "length_s": 1.0, "moves": [ "fore", "hand", "upper" ] } ] }, "fbx_all_actions_off": { "label": "FBX, All Actions off", "loaded": true, "animation_count": 0, "animations": [] }, "fbx_scene_take": { "label": "FBX, All Actions off and NLA Strips off", "loaded": true, "animation_count": 1, "animations": [ { "name": "Scene", "length_s": 1.0, "moves": [ "fore", "hand", "upper" ] } ] } } } ], "loop_suffix": { "blend": [ { "name": "spin", "loop_mode": "linear" } ], "glb": [ { "name": "spin", "loop_mode": "linear" } ], "glb_active_actions": [ { "name": "Animation", "loop_mode": "none" } ], "glb_nla_tracks": [], "glb_scene": [ { "name": "fan", "loop_mode": "none" } ], "fbx": [ { "name": "fan|spin", "loop_mode": "linear" } ], "fbx_all_actions_off": [], "fbx_scene_take": [ { "name": "Scene", "loop_mode": "none" } ] }, "suffixes": [ { "object": "wall-col", "godot_docs_say": "-col: keep the mesh, add a static body with a collision shape", "blend": [ { "node": "wall", "class": "MeshInstance3D" }, { "node": "wall/StaticBody3D", "class": "StaticBody3D" }, { "node": "wall/StaticBody3D/CollisionShape3D", "class": "CollisionShape3D", "shape": "ConcavePolygonShape3D" } ], "glb": 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{ "material": "rough_075", "unity_fbx": { "smoothness": 0.25, "metallic": 0, "base_map": null, "normal_map": null, "metallic_gloss_map": null, "surface": 0, "alpha_clip": 0 }, "unity_glb": { "roughness": 0.75, "metallic": 0, "base_color_texture": null, "normal_texture": null, "metallic_roughness_texture": null, "surface": 0 } }, { "material": "rough_100", "unity_fbx": { "smoothness": 0, "metallic": 0, "base_map": null, "normal_map": null, "metallic_gloss_map": null, "surface": 0, "alpha_clip": 0 }, "unity_glb": { "roughness": 1, "metallic": 0, "base_color_texture": null, "normal_texture": null, "metallic_roughness_texture": null, "surface": 0 } }, { "material": "metal_030", "unity_fbx": { "smoothness": 0.7, "metallic": 0, "base_map": null, "normal_map": null, "metallic_gloss_map": null, "surface": 0, "alpha_clip": 0 }, "unity_glb": { "roughness": 0.3, "metallic": 1, "base_color_texture": null, "normal_texture": null, "metallic_roughness_texture": null, "surface": 0 } }, { "material": "color_tex", "unity_fbx": { "smoothness": 0.5, "metallic": 0, "base_map": "color_tex", "normal_map": null, "metallic_gloss_map": null, "surface": 0, "alpha_clip": 0 }, "unity_glb": { "roughness": 0.5, "metallic": 0, "base_color_texture": "color_tex", "normal_texture": null, "metallic_roughness_texture": null, "surface": 0 } }, { "material": "rough_tex", "unity_fbx": { "smoothness": 0.5, "metallic": 0, "base_map": null, "normal_map": null, "metallic_gloss_map": null, "surface": 0, "alpha_clip": 0 }, "unity_glb": { "roughness": 1, "metallic": 0, "base_color_texture": null, "normal_texture": null, "metallic_roughness_texture": "rough_tex", "surface": 0 } }, { "material": "normal_tex", "unity_fbx": { "smoothness": 0.6, "metallic": 0, "base_map": null, "normal_map": "normal_tex", "metallic_gloss_map": null, "surface": 0, "alpha_clip": 0 }, "unity_glb": { "roughness": 0.4, "metallic": 0, "base_color_texture": null, "normal_texture": "normal_tex", "metallic_roughness_texture": null, "surface": 0 } }, { "material": "alpha_tex", "unity_fbx": { "smoothness": 0.4, "metallic": 0, "base_map": "alpha_tex", "normal_map": null, "metallic_gloss_map": null, "surface": 0, "alpha_clip": 0 }, "unity_glb": { "roughness": 0.6, "metallic": 0, "base_color_texture": "alpha_tex", "normal_texture": null, "metallic_roughness_texture": null, "surface": 1 } } ], "generated_model_glb_imported": false, "generated_model_glb_report": [ "glTF extension EXT_texture_webp is not supported" ] }, "not_measured_here": [ "Godot 3.x, the .NET (C#) build of Godot, and Godot versions other than the one listed.", "The FBX2glTF importer, which Godot still offers as an option; everything here is ufbx, the default.", "Collada (DAE) and OBJ. OBJ carries no animation and no PBR material, so it is not an answer to this question.", "Third party add-ons on either side, such as Blender add-ons that export Godot scenes directly.", "Skinned meshes with vertex weights. The armature test parents rigid objects to bones, which is what the r/godot thread describes; skin weights are a separate test.", "How the scenes look when rendered. Every value here is read from the imported resources, not judged from a picture." ] }