• Adobe After Effects

  Problems of white lines around any objects

  Posted by Mit Panchani on October 28, 2015 at 4:06 am

  I am having an problem as described in image –

  Any object i draw in after effects , when i zoom in to align with other object there is 2px thick white line beyond actual boundary of shape.

  This varies as i move the object in the composing area.

  Is that normal or i need to do something to get rid of it?

  I have selected no stroke – its 0 px.

  occurs in all new projects too , i.e. its global for me.

  screenshot – https://goo.gl/photos/jNSbu5SLbUGDPkdUA

  

  Mit Panchani replied 10 years, 6 months ago 3 Members · 9 Replies
• 9 Replies

• 

  John Cuevas

  October 28, 2015 at 1:28 pm

  What are your comp settings, aspect ratio, pixel aspect ratio. Also, can you post a screen shot of your timeline with any changes to the layer twirled open?

  Johnny Cuevas, Editor
  ThinkCK

  “I have not failed 700 times. I have succeeded in proving that those 700 ways will not work. When I have eliminated the ways that will not work, I will find the way that will work.”
  —THOMAS EDISON on inventing the light bulb.
• 

  Mit Panchani

  October 28, 2015 at 4:42 pm

  1080 at 25fps

  I havent turn stroke on. it’s 0 pixels
• 

  Mit Panchani

  October 28, 2015 at 4:43 pm

  No strokes applied.
• 

  Kalleheikki Kannisto

  October 29, 2015 at 7:15 pm

  Please provide a screenshot like this no we can narrow down the possible problem:

  
• 

  Mit Panchani

  October 29, 2015 at 7:28 pm

  

  Here is the second shot
• 

  Kalleheikki Kannisto

  October 30, 2015 at 8:02 am

  I don’t see any problem there, only an antialiased soft edge from the shape not being aligned to pixel edges.
• 

  Mit Panchani

  October 30, 2015 at 8:09 am

  So that’s an absolute normal thing?
  That changes the opacity as i change the position of the object.

  When i move the object with arrow keys, there is one position when that line becomes solid and no more a hindrance.
• 

  Kalleheikki Kannisto

  October 30, 2015 at 12:22 pm

  Yes, that “in-between color” pixel is normal sub-pixel sampling. That is how most pixel-based imaging programs deal with edges that don’t align perfectly to a specific pixel edge, they blend the values in an attempt to produce a smoother output. It is the same as you see in the outlines of the text, just on a vertical edge that is not aligned to a specific pixel.

  Essentially you will have to make sure that the edges are mathematically exact to get rid of that effect.

  A potentially useful resource for you:

  https://chrissilich.com/blog/after-effects-expression-snapping-objects-to-whole-pixels/

  You will still have to make the solids an even number of pixels wide and tall for this to work on every edge.
• 

  Mit Panchani

  October 30, 2015 at 2:11 pm

  Thanks for the guide. Understood what you conveyed, cleared my doubts.

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