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How can I set the shadow offset in graphicsLayer? The top shadow of components at the bottom of the screen is almost invisible. I want to fix the shadow offset.

image.png

Short answer: you can’t.
Elevation has some limitations, it uses a `fixed-position spot light source`, positioned above the center of the screen, and changing it requires <https://blog.sebastiano.dev/playing-with-elevation-in-android-part-2/|private APIs>. In general, use the new shadow API modifiers(`dropShadow`, `innerShadow`) introduced in recent Compose versions. They’re much more configurable.

<https://medium.com/android-news/mastering-shadows-in-android-e883ad2c9d5b>

If I use drop shadow, how about its performance?

I haven’t used them much, but I reviewed the implementation. It’s pretty good, it has a caching system, uses brushes and the canvas efficiently, and nothing caught my attention that might cause performance issues.

This article have some very cool graphics of how each component is positioned on top of each other. Really cool.