A sprite made in Photoshop with, for example, 10x10px was used in my project. At 100% scale I thought it was at its original size and every square there was a pixel. But by decreasing this sprite to 1% scale there was no distortion, all the painted pixels were there, raising the question: what is the displayed size, because a pixel could not be even smaller.
The same happened with a degraded circle (made in larger proportions). By lowering it to a size smaller than the 10x10 pixel art for example, it continued a great, non-pixelated circle and with a great gradient. this at the minimum scale size of the Construct properties window, and smaller thant my 10x10 pixel art, what give me the impression that a lot of pixels ( necessary to make a circle and a degrade) is fiting in a one pixel space.
So I'm not understanding the size parameters and how its really works in the layout.
I'm not sure what you're seeing without pictures, but since Construct uses high-quality resizing, if you resize things really small they tend to still look good.
I apreciate the help.
I get in doubt about the measurement unity, if is pixel. Like the Screen size unity, and the sprite height and width. Because I dont know how a sprite 1 height and 1 width can reproduce a circle and grandient so well as are reproduced.
I attached a image.
It's complicated, but roughly speaking 1 unit in the layout is equal to 1 CSS pixel. I can't see any image attached by the way.
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Interesting, maybe in a moment I will research on the topic.
(About the image, when trying to link, only a numeric code like this img = 340xx between  appeared.
But for me the issue of the topic has already been resolved. I appreciate the help.)