Add Gradient Overlay to avoid flat color and Stroke to add photo border, which is the characteristic of a Polaroid photo.

添加渐变叠加，以避免平面彩色和中风添加照片边框，这是一个宝丽来照片的特点。

youdao

CSS Ninjas appears to use flat colors at first glance, but each colored area has a subtle gradient, which gives it texture.

一眼看去，CSS Ninjas似乎使用的是平直颜色。不过其实每个色彩区域都有微弱的渐变，创造出迷人的材质效果。

youdao

Add Gradient Overlay to avoid flat color and Bevel and Emboss to give it three-dimensional appearance.

添加渐变叠加，以避免平面色彩和斜面和浮雕，给它的三维外观。

youdao