user18213: I have a composition of a video and a 3d object on it, coming from CINEMA 4D. There is a ~1 pixel wide glowing artefact around the edge of the imported 3d object. What can be the reason and how can I fix it?


user1950: Have a look at how AE is interpreting the footage (right-click it in the project and look for Interpret Footage>Main). Specifically look at how it is interpreting the alpha channel, it could be interpreting a straight alpha channel as pre-multiplied or the alpha channel might be pre-multiplied with another colour instead of black). Have a go at switching between alpha modes, or try setting the pre-multiplied colour to white instead of black.
If that fails you'll need to de-fringe the layer in your comp. A simple choker effect would do the trick.

18213: <p>I have a composition of a video and a 3d object on it, coming from CINEMA 4D. There is a ~1 pixel wide glowing artefact around the edge of the imported 3d object. What can be the reason and how can I fix it?</p>

<p><a href="https://i.stack.imgur.com/vpO09.jpg" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/vpO09.jpg" alt="the mattress is the 3D object, the light edge is clearly visible, especially on the lower right edge"></a></p>
 1950: <p>Have a look at how AE is interpreting the footage (right-click it in the project and look for <strong>Interpret Footage>Main</strong>). Specifically look at how it is interpreting the alpha channel, it could be interpreting a straight alpha channel as pre-multiplied or the alpha channel might be pre-multiplied with another colour instead of black). Have a go at switching between alpha modes, or try setting the pre-multiplied colour to white instead of black.</p>

<p>If that fails you'll need to de-fringe the layer in your comp. A simple choker effect would do the trick.</p>
