[WebGL] Dirty gray artefacts around images

[WebGL] Dirty gray artefacts around images
0.0 0

#1

Problem:
chrome_2017-08-11_21-49-10

Currently I don’t know if this is the fault of WebGL, Cocos Creator or me. The only way I know to get rid of these artefacts is cc.view.enableAntiAlias(false). But I honestly don’t want to do this, since it makes other images jagged and the overall look becomes horrible.