Raytracing Module/レイトレーシングワークベンチ

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This page is a translated version of the page Raytracing Workbench and the translation is 28% complete.
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The Raytracing workbench is essentially obsolete. New development is happening in the Render Workbench, which is intended as its replacement. This workbench is fully programmed in Python so it is much easier to extend.

Nevertheless, the information in this page is generally useful for the new workbench, as both modules work basically in the same way.

Raytracing workbench icon



Template:Raytracing Tools/jp


もっとも簡単な方法は現在の3Dビューとその内容全てをPOV-rayファイルにエクスポートするというものです。まずCADデータを読み込むか作成するかし、適当な3D表示の位置に設定する必要があります。その後、Raytracingメニューから"Export View..."を選択します。

FreeCAD Raytracing.jpg




Scharniergreifer render.jpg



import Raytracing,RaytracingGui
OutFile = open('C:/Documents and Settings/jriegel/Desktop/test.pov','w')
del OutFile

The Workbench Raytracing.svg Raytracing Workbench is used to generate photorealistic images of your models by processing them with an external renderer.

The Raytracing Workbench works with templates, which are project files that define a scene for your 3D model. You can place lights and geometry such as ground planes, and it also contains placeholders for the position of the camera, and for the material information of the objects in the scene. The project can then be exported to a ready-to-render file, or be rendered directly within FreeCAD.

Currently, two renderers are supported: POV-Ray and LuxRender. To be able to render from within FreeCAD, at least one of these programs must be installed and configured in your system. However, if no renderer is installed, you will still be able to export a project file to be rendered at another time.

現在、Lux RendererやYafarayなどの複数のバックエンドをサポートするための新しいRenderer Workbenchが開発中です。開発版を使用するための情報はRender_projectで見ることができます。

Raytracing example.jpg

Typical workflow

  1. Create or open a FreeCAD project, add some solid objects (Part-based or PartDesign-based); meshes are currently not supported.
  2. Create a Raytracing project (povray or luxrender).
  3. Select the objects that you wish to add to the Raytracing project and add them.
  4. Export the project file or render it directly.

Raytracing Workbench workflow.svg

Workflow of the Raytracing Workbench; the workbench prepares a project file from a given template, and then calls an external program to produce the actual rendering of the scene. The external renderer can be used independently of FreeCAD.


Project tools

These are the main tools for exporting your 3D work to external renderers.

  • Raytrace New.svg New PovRay project: Insert new PovRay project in the document
  • Raytrace Lux.svg New LuxRender project: Insert new LuxRender project in the document
  • Raytrace NewPartSegment.svg Insert part: Insert a view of a Part in a raytracing project
  • Raytrace ResetCamera.svg Reset camera: Matches the camera position of a raytracing project to the current view
  • Raytrace ExportProject.svg Export project: Exports a raytracing project to a scene file for rendering in an external renderer
  • Raytrace Render.svg Render: Renders a raytracing project with an external renderer


These are helper tools to perform specific tasks manually.


  • Preferences-raytracing.svg Preferences: Preferences available in for the Raytracing tools.


Creating a povray file manually

The utility tools described above allow you to export the current 3D view and all of its content to a Povray file. First, you must load or create your CAD data and position the 3D View orientation as you wish. Then choose "Utilities → Export View..." from the raytracing menu.

FreeCAD Raytracing.jpg

You will be asked for a location to save the resulting *.pov file. After that you can open it in Povray and render:


As usual in a renderer you can make big and nice pictures:

Scharniergreifer render.jpg


See the Raytracing API example for information on writing scenes programmatically.




レンダラーモジュールの開発ステータスについてはレイトレーシングプロジェクト を見てください。


Exporting to Kerkythea

Although direct export to the Kerkythea XML-File-Format is not supported yet, you can export your Objects as Mesh-Files (.obj) and then import them in Kerkythea.

  • if using Kerkythea for Linux, remember to install the WINE-Package (needed by Kerkythea for Linux to run)
  • you can convert your models with the help of the mesh workbench to meshes and then export these meshes as .obj-files
  • If your mesh-export resulted in errors (flip of normals, holes ...) you may try your luck with netfabb studio basic
Free for personal use, available for Windows, Linux and Mac OSX.
It has standard repair tools which will repair you model in most cases.
  • another good program for mesh analysing/repairing is Meshlab
Open Source, available for Windows, Linux and Mac OSX.
It has standard repair tools which will repair you model in most cases (fill holes, re-orient normals, etc.)
  • you can use "make compound" and then "make single copy" or you can fuse solids to group them before converting to meshes
  • remember to set in Kerkythea an import-factor of 0.001 for obj-modeler, since Kerkythea expects the obj-file to be in m (but standard units-scheme in FreeCAD is mm)
Within WIndows 7 64-bit Kerkythea does not seem to be able to save these settings.
So remember to do that each time you start Kerkythea
  • if importing multiple objects in Kerkythea you can use the "File → Merge" command in Kerkythea


These pages refer to the new workbench, programmed in Python, meant to replace the current Raytracing Workbench.


These pages refer to a replacement workbench, programmed in C++, proposed around 2012, which was never completed.