We start the rendering and we get the object with only its shadowĪs you can see, in the figure there are two types of "shaded areas": the part of the cube not exposed to light (1) and the shadow that is projected on the plane, now invisible, (2) We eliminate the background of the rendered image by checking the "Transparent" option in the "Render Properties" tab > Film To hide the plane, but not the shadow of the cube, we select it and in the Object Properties tab of the Properties Window, in the Visibility subpanel, we set the option "Shadow Catcher" (that is, we consider it only as a "shadow catcher") ![]() ![]() We press the F12 key to create the rendered image We raise the cube and create under a plane, we place the camera, set Cycles as rendering engine, in the Render Properties tab of the Properties Window, and 500 Samples for the Render This can be especially useful when we want to add a 3D object on a pre-existing photo, to better adapt the shadow to the light and objects present in the image, without having to render the scene with each change.Īs an example of a model to be used for photo insertion, let's create a simple cube with its shadow: let's start from the default scene and give the cube color #95A6FF, in the "Material Properties" tab of the Properties Window In this tutorial for Blender (updated to version 2.9) we see how to change the color and how to darken/ lighten the shadow of an object in the Blender Compositor.
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