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Project options

Project options allow to control rendering process and result.

Rendering process options

Parameter Type Description
Renderer String The name of the raytracing engine to use
Template String The template to be used by the rendering
Delayed Build Boolean If true, the views will be updated at render time only
Page Result Included File The exported file to be sent to the external renderer
Output Image File The image file saved by the rendering
Open After Render Boolean If true, the rendered image is opened in FreeCAD when the rendering is done

Comments:

  • The Render workbench uses the same template logic as the Raytracing workbench, and templates are fully compatible. Templates usually contain:

    • Lighting presets
    • Renderer specific options (resolution, sampler, thread counts, GPU use...)

    We provide a few default templates, but you can write and use your own ones, if necessary.
    Template file is defined by Template parameter. It contains the relative path to the template, starting from the workbench's templates subdirectory. The use of the relative path, instead of the absolute path, makes the FreeCAD file fully portable from one computer to another. By default, the Template parameter is read-only in the GUI: the recommended way to modify it is to use the context menu of the Project.

  • Like the builtin Raytracing workbench, the Render workbench offers the possibility to update the View objects whenever its source object changes, which costs extra processing time every time the source object changes, but quickens the final export. However it also offers a mode where the views are updated all at once, only when the render is performed. This makes the render slower, but adds virtually no slowdown during the work with FreeCAD, no matter the size of a Render project. This behaviour is controlled by the Delayed Build parameter.

Rendering result options

Parameter Type Description
Render Width Integer The width of the rendered image (in pixels)
Render Height Integer The height of the rendered image (in pixels)
Ground Plane Boolean If true, a default ground plane is added to the scene
Ground Plane Z Float Z position of ground plane
Ground Plane Color RGB Color of ground plane
Ground Plane Size Factor Float A factor to control the size of the ground plane. Default value 1.0 makes the ground plane fit the scene bounding box.
Transparency Sensitivity Integer A factor to augment transparency in whole scene. This affects only implicit materials (materials generated from shape color and transparency), it will have no effect on explicit materials (materials generated from material cards).

Mesher options

These parameters controls mesher behaviour. Render uses FreeCAD standard mesher, you may find some more information in FreeCAD documentation

Parameter Type Description
Linear Deflection Float The maximum linear deviation of a mesh section from the surface of the object (the lower the finer).
Angular Deflection Float The maximum angular deviation from one mesh section to the next, in radians. This setting is used when meshing curved surfaces (the lower the finer).

Warning: Be careful when setting those parameters. Unappropriate values can lead to extremely long processing duration.