Shadow-catcher showing up in render

Hi there,
I have a problem with rendering a tracked clip containing 3d objects it. I have a 3d coffee pot, cups, and saucers on top of a dishwasher in the scene. In order to catch the shadows, I made a 3d object to be a shadow-catcher and to roughly match the dishwasher shape as shown in the screenshot:



However, when I render the clip out with the 3d objects included, the shadow-catcher is visible at the edges as a sort of partly-visible, shadowy object (notice how it “cuts through” the vase on the dishwasher as marked in red):

 <img src="/uploads/default/original/4X/5/4/1/5416d7985bc5daaaf7b59c09a5a1d09ac7331216.PNG" width="690" height="432"><br/>
 Any ideas about how I can correct this so that only shadows thrown by the coffee pot and other 3d objects are shown, without the shape of the shadow-catcher being visible in the render?

 Here is a link to the project file: [http://pasteall.org/blend/index.php?id=49160](http://pasteall.org/blend/index.php?id=49160)Thanks in advance!
   God bless,
          Raphael

problem is you did roughly match the dishwasher shape. Solutions is to match it correctly and ad models like the vase and other objects on top of the dishwasher as well for shadow catching.
Another and in my opinion faster way is to render out your scene without background and do some compositing with masks and fake shadows.
The only thing that makes me thinking about that scene is the “offset” of the background and your shadow catcher… maybe the background and your scene are not in sync. looks like 1 frame ore something. a little bit hard to tell whats goinf on there. Maybe do not camera project the background… no idea because in your file there is no background footage. looks all a bit strange…

In this kind of scene I would use a simple plane as shadow catcher and mask off the shadows in comp so that they don’t creep over the edge of washer. The sides of washer don’t catch any shadows from your objects so you don’t need them. You need the shadow plane to reach the edges of the washer, which is imho best done in comp by using a bigger plane and mask. In the vase area just fade out the shadow element so that you don’t have to mask the vase. With mask you can control the softness of edge area way better than with solid shadowcatcher object that must perfectly match the real object (not too eay feat).