Autodesk 3DS

Reference – Довідка

Category – Категорія:

Import-Export – Імпорт-Експорт

Menu – Меню:

File ‣ Import/Export ‣ 3D Studio (.3ds)

Version:

2.3.4

Blender:

3.6

Authors:

Bob Holcomb, Campbell Barton, Sebastian Schrand

Maintainer – Підтримувач:

Sebastian Sille (NRGSille)

Support Level – Рівень Підтримки:

Community

Usage – Використання

This add-on can be used to import and export objects to/from the 3DS Studio file format, the native file format of the 3D Studio DOS releases R1 to R4. This format is one of the first 3D file formats beside OBJ and was commonly used to exchange files from Autodesk® 3ds MAX®.

Properties – Властивості

Import – Імпорт

Include – Включення

Image Search – Пошук Зображень

This enables a recursive file search if an image file can’t be found.

Read Keyframe

Reads the keyframe tracks from a 3ds file and transforms the objects to the data wich was found. Usually only one frame is found in static scenes, it will be imported to the timeline. If the 3ds scene is animated, the complete animation will be imported to the timeline.

Transform – Трансформа

Forward / Up Axis – Вісь Уперед / Уверх

Since many applications use a different axis for „Up“, these are axis conversions for Forward and Up axes – By mapping these to different axes you can convert rotations between applications default up and forward axes. Blender uses Y forward, Z up (since the front view looks along the +Y direction). For example, its common for applications to use Y as the up axis, in that case -Z forward, Y up is needed.

Size Constraint

Scales the imported objects by 10 scene units until it reaches the size defined here. To disable set the Size Constraint to zero.

Apply Transform – Застосувати Трансформу

Applies object transformations after importing. If unchecked, all objects will stay at its origins.

World Space – Простір Світу

Use world matrix instead of local matrix to transform the objects. This is useful for older 3ds files from 3D Studio DOS wich only used world space to transform the objects. It is also useful if the object was exported without apply transform.

Export – Експорт

Include – Включення

Selection Only – Лише Вибрання

When checked, only selected objects are exported. Otherwise export all objects in the scene.

Transform – Трансформа

Forward / Up – Уперед / Уверх

Since many applications use a different axis for pointing upwards, these are axis conversion for these settings, Forward and up axes – By mapping these to different axes you can convert rotations between applications default up and forward axes. Blender uses Y forward, Z up (since the front view looks along the +Y direction). For example, it is common for applications to use Y as the up axis, in that case -Z forward, Y up is needed.

Materials – Матеріали

Materials in 3ds are defined in various color and percent chunks wich can include either integer percent and 24bit color values or float color and percent values, both can be read by the importer and will be converted to blender values. The exporter uses the integer values, since this is used from 3ds version 3 and above. The material definitions wich Blender can use are the following:

  • 3ds Diffuse Color <-> blender Base Color

  • 3ds Specular Color <-> blender Specular Color

  • 3ds Ambient Color <-> blender Emission Color

  • 3ds Mat Shininess <-> blender Roughness inverted

  • 3ds Mat Shin2 <-> blender Specular Intensity

  • 3ds Mat Shin3 <-> blender Metallic

  • 3ds Mat Opacity <-> blender Alpha inverted

  • 3ds Mat Bump PCT <-> blender Normalmap Strength

  • 3ds Self Illum PCT <-> blender Emission Strength

Textures – Текстури

Each 3ds material can include different texture mappings, which are all imported to Blender material nodes including texture coordinates. The 3ds exporter basically takes the images and coordinates, wich are directly connected to the Principled BSDF shader, if an image is connected to a colormix shader, it will exported as secondary texture. Shininess maps to roughness and opacity to the alpha channel, they must be color inverted afterwards to match with Blender definition. The material mappings are defined as following:

  • 3ds Diffuse Map <-> blender Base Color Texture

  • 3ds Specular Map <-> blender Specular Texture

  • 3ds Shininess Map <-> blender Roughness Texture

  • 3ds Reflection Map <-> blender Metallic Texture

  • 3ds Opacity Map <-> blender Alpha Texture

  • 3ds Self Illum Map <-> blender Emission Texture

  • 3ds Bump Map <-> blender Normal Map (tangent space)

  • 3ds Tex2 Map <-> blender Color Texture (connect to mixshader)

../../_images/addons_io_3ds_material-nodes.jpg

An example of a 3ds file with all image maps imported.

Примітка

All texture filenames are limited to the 8.3 DOS format, means that the name of the image texture can only be 8 characters long, others will be stripped away.

Meshes – Сіті

Meshes are made of triangles only, no quads are supported, 3ds Studio uses edge visibilty flags to hide and show edges, many 3ds files use them to mark the quads. The Blender 3ds importer and exporter will use those flags to mark edges sharp, this can be used to convert the triangles back to quads. The importer can read the smoothchunk and shades a face smooth if it belongs to a smoothgroup, the exporter creates a smooth chunk if the mesh contains any smooth faces. 3ds only supports one pair of UV coordinates per vertex. If any vertex has more UVs, it will be dublicated.

Ambient

If ambient chunks are found by the importer, a new world with the ambient color will be created. Ambient keyframes will be imported to the timeline. The exporter creates an ambient chunk with the color of the active world if there is any.

Lights – Освітлювачі

Lights in 3DS Studio can be a point source or a spotlight, they can be animated, using color and energy data and a target for the spotlight. The lights can be imported and exported, target data is calculated to Z and X axis angle for pan and tilt, Y is used for the roll angle.

Cameras – Камери

Cameras can be imported and exported to 3ds files. They can be animated with field of view (converted to focal length), position and target data, calculated to X and Z axis angle for pitch and yaw, Y is used for the roll angle.

Keyframes – Ключкадри

The importer can read the keyframes, they will be added to the timeline. Most animations will play, but the transformations may not be correct, some axes or rotations can be inverted. It depends on how it was exported from other applications.