This tutorial reviews how to apply a texture to an object in Sketchup, and then import those textures and model into Cinema 4D. This is certainly a viable option, though I recommend becoming familiar with using Cinema 4D's robust texturing tools to help you create convincing materials. There are other material examples in the “examples” folder of the Ocean installation directory.- Depending on your workflow, you may begin texturing your model in Sketchup.
This is it! You may try the many materials and light options, and read the Reference manual SketchUp Cornell Box tutorial - part 2 Conclusion ¶ Improve your workflow by editing geometry while keeping your material and light settings in Oceanĭefine a metallic material and use Ocean libraries In the next tutorial, you will see how to: You can save the scene for the next tutorial. You now have a perfect white balance for your image: The values extracted in the image are directly copied to the output toolbox’s white point As previously, click on the pipet and drawĪ rectangle on the image (4). In the output toolbox, a white point pipet tool simplify this process. You can copy the values by right clicking on it, and The white point values to set are visible in (3). Then click on the white point selection pipet (1), and draw a rectangle on the image inside the light source (2),Īs below. Open the Pixel Info toolbox (if it is hidden, you may find it in the Tools The white balance is much better, but we could also measure a light value directly on the image to then set as white Look for the xyztorgb filter, and set these values in the xwhite and ywhite fields. During the render, go to the output toolbox.
For instance, tungsten has a white point of x=0.44757, y=0.40745. Or better, some cameras have a “Measure” mode for the white balance, in order to precisely match the illuminant. To change the white balance of the camera to a warmer setting, in order to match the eye adaptation to the illuminant. The light source spectrum of the Cornell Box looks like a tungsten source. On a digital camera, this is equivalent to setting the white balance to “Daylight” or “6500K”. It is set to a white point of x=0.3127 and y=0.3290, which corresponds to the D65 This is due to the default white balance usedīy Ocean for generating images. The result is now calculated from actual measured material spectra: Customizing render ¶Īs you can see, the white parts of the box are looking orange-brown. The 3D position from the Cornell Box description will be mapped to the following SketchUp axis: Delete the default character model if necessary. Tutorial ¶ Modeling the scene with SketchUp ¶ Geometry ¶
In this tutorial, we propose to model the Cornell Box using SketchUp, define the materials and simulate pictures with Ocean 2017. The cornell box data, including geometry and material properties, is available on Of Computer Graphics for their paper Modeling the Interaction of Light Between Diffuse Surfaces published and Greenberg, and Bennett Battaile at the Cornell University Program With an actual photograph of the same scene, and has become a commonly used 3D test model.
The Cornell box is a test aimed at determining the accuracy of rendering software by comparing the rendered scene SketchUp Cornell Box tutorial - part 1 ¶ Introduction ¶