Very strange drawing bug

  • Link to .capx file (required!):

    dl.dropboxusercontent.com/u/41931267/VeryOddBug.capx

    Steps to reproduce:

    1. Run capx

    2. Move around with arrow keys

    Observed result:

    Here's an image of the effect on my PC.

    <img src="https://dl.dropboxusercontent.com/u/41931267/VeryOddBug.png" border="0" />

    Basically, it seems that every tick, the main player object leaves an 'imprint' of itself on the background.

    I found this issue after I accidentally deleted the background sprite in a larger project. So, I backed up the project and began to cut out everything that wasn't a part of the issue. For some reason, there is one object (I called it 'WhyDoesThisBugTheGame) that causes this issue - if I delete it, the issue remains (although the background is still strangely black. Shouldn't it be grey?)

    If the issue doesn't occur for anyone else then I'll assume it's a graphics driver issue, however I'm fairly sure I'm updated.

    This isn't a webgl issue either, as it also happens with webgl off.

    Browsers affected:

    Chrome: yes

    Firefox: yes

    Internet Explorer: yes

    Operating system & service pack:

    Windows 7 64bit

    Construct 2 version:

    r127 (but it definitely occurred before r127)

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  • You've got Transparency set to YES on the Layer! <img src="smileys/smiley1.gif" border="0" align="middle" /> Someone actually wrote a game a while back that took advantage of this.

  • Closing as not a bug: you have a transparent layer and 'clear background' set to 'no', so you've told Construct 2 to never clear between frames.

  • Ashley Ah - I was confused as the removal of that other object actually fixed the problem. Sorry.

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