UPD. When compiling openfl4 with -Dcanvas looks like on the second image
When build with Openfl 3.x with -Dwebgl flag looks fine too. Did anyone face with this problem?
Do you set
<window width="" height="" /> in your project.xml? The default template will attempt to scale and letterbox based on the width and height used
I found problem: when using float coordinates for display objects then you get blur effect in webgl.
We have display coordinate rounding/snapping in the canvas and DOM renderers, but I don’t believe the GL renderer is doing this. I’ll look into it