import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: Scaffold(
        body: Column(
          mainAxisAlignment: MainAxisAlignment.spaceAround,
          children: [
            // widthHeight >= 512 breaks shadows
            Circle(color: Colors.red, widthHeight: 512, heightOffset: 0),
            // shadows are fine when width and height are below 512
            Circle(color: Colors.green, widthHeight: 511, heightOffset: 0),
            // shadows are fine when height != width
            Circle(color: Colors.green, widthHeight: 512, heightOffset: 0.0001),
          ],
        ),
      ),
    );
  }
}

class Circle extends StatelessWidget {
  const Circle({
    Key? key,
    required this.heightOffset,
    required this.widthHeight,
    required this.color,
  }) : super(key: key);
  final double heightOffset;
  final double widthHeight;
  final Color color;
  @override
  Widget build(BuildContext context) {
    return Align(
      alignment: Alignment.topLeft,
      child: SizedBox.shrink(
        child: OverflowBox(
          maxWidth: double.infinity,
          maxHeight: double.infinity,
          child: PhysicalModel(
            color: color,
            elevation: 50,
            shape: BoxShape.circle,
            child: SizedBox(
                width: widthHeight, height: widthHeight + heightOffset),
          ),
        ),
      ),
    );
  }
}