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Activity Forums Adobe After Effects rhomboid query

  • rhomboid query

    Posted by Chris Brett on November 15, 2012 at 1:43 pm

    I get the idea this is a beginners question but I’m real puzzled as to why my nice square picture inserts turn into rhomboids when I rotate them ??????

    Anybody know why please ?

    Also please, I have a new Dell monitor which displays all circles wider than they should be, as ovals, and if anyone has any thoughts on that as well I’d very much appreciate it also.

    All the best.

    Chris Brett / / u k

    Chris Brett replied 13 years, 8 months ago 4 Members · 6 Replies
  • 6 Replies
  • Joseph W. bourke

    November 15, 2012 at 3:02 pm

    Chris –

    Without seeing it, it sounds to me as if you’ve got a mask which isn’t rotating when the material inside the mask is rotating. That’s the only thing I can imagine which would turn a square into a rhombus. Or are you using a matte channel?

    Joe Bourke
    Owner/Creative Director
    Bourke Media
    http://www.bourkemedia.com

  • Chris Brett

    November 15, 2012 at 3:09 pm

    Hi Joe

    — thanks for your reply – much appreciated.

    I have a still which is cropped using a mask rather than an applied matte —– still puzzled ……

    ———- chris —

  • Tudor “ted” jelescu

    November 15, 2012 at 3:18 pm

    Could it just be a setting in the video card? (ex: your desktop is set 1920×1080 but the actual screen resolution is 1920×1200)

    Tudor “Ted” Jelescu
    Senior VFX Artist

  • Joseph W. bourke

    November 15, 2012 at 3:24 pm

    Chris –

    Is it possible that the mask inadvertantly got locked? You can lock a mask independent of the layer it’s working on. Just a thought. Otherwise, I would image that the mask always moves and rotates with the clip – I’ve never had it do otherwise.

    Joe Bourke
    Owner/Creative Director
    Bourke Media
    http://www.bourkemedia.com

  • Ridley Walker

    November 15, 2012 at 3:41 pm

    [chris brett] “Also please, I have a new Dell monitor which displays all circles wider than they should be, as ovals, and if anyone has any thoughts on that as well I’d very much appreciate it also.

    Could it be that you’re working with non-square pixels?

  • Chris Brett

    November 15, 2012 at 4:02 pm

    — many thanks Guys — all very much appreciated

    — will check the video card settings — sounds like a likely culprit and would explain both issues

    —– and will also checkout the possibility of a ‘locked

    mask’…might need it one day anyway ……

    — all the best ——–chris —

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