The following file formats are supported:

The following file formats for the texture of the 3D object are supported:

• JPG

• PNG

• PSD

• TGA

• TIFF

It is not mandatory to have texture in a 3D object, but a 3D object with texture displays better.

Important: Editing or replacing textures for a multi-colored 3D object is currently not possible within VStitcher or Lotta.

VStitcher and Lotta now use PBR, allowing for an increase in the number of material maps beyond diffuse, specular, and normal, such as specular tint, roughness, sheen, subsurface, and more. Details of the maps are shown in the Context view for each material type. For more information on PBR, refer to PBR Support.

VStitcher and Lotta use real world dimensions, therefore it is highly recommended to prepare external assets the same size as their real world size.

In order to import any 3D trim with proper orientation, when preparing the trim in external software, you must ensure that the front face of the trim is parallel to the Y axis.

For example, if the trim is a button, you must ensure that the face of the button is looking up towards the top of the screen as seen by the viewer.

For example, if the trim is a zipper, you must ensure that the face of the zipper is looking up towards the top of the screen as seen by the viewer.

VStitcher and Lotta use a number of connecting points or lines that define the way the imported 3D objects connected to the garment. Two connectors are automatically assigned when you import the object and set its orientation.

• For creating your own connectors in the external software, refer to Creating Connectors in External Software.
• In VStitcher and Lotta, you can delete the automatic connectors and assign others to a different location. For more information, refer to Editing the Connectors .

You can use VStitcher and Lotta to edit the colors of a 3D object. You may edit the textures of a 3D object before importing the object.

The software enables control over the different colors of different materials found on a 3D trim. Each material can be individually edited in its diffuse color, specular color, specular spread and normal depth. However, you cannot edit or replace textures for a multi-colored 3D object.

VStitcher and Lotta read the imported file and detects which materials are assigned on the different geometries. The name of the assigned material is displayed in the VStitcher or Lotta material editor. It is recommended to use distinctive names for materials so they can easily be identified and distinguished in VStitcher and Lotta.

In general, it is recommended to:

• Create objects the same size as in real life.

• Apply freeze transformation before exporting objects from any external 3D application. Freeze transformation is a common function found in any 3D app which resets all transformation values, but keeps the object in place.

For example:

• If you want to import a 3D object that is a single object, such as a button, you should apply freeze transformation to keep the size (scale) as expected.

• If you want to import a 3D object that consists of multiple objects, such as a zipper puller and drawcord, you should apply freeze transformation to maintain the position and rotation among the multiple objects.