Demo of Flutter WEB shadows (and fonts) rendering issue

main.dart

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.indigo,
      ),
      home: ShadowsExample(),
    );
  }
}

class ShadowsExample extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('Shadows WEB issue'),
      ),
      body: SingleChildScrollView(
        child: Padding(
          padding: EdgeInsets.fromLTRB(20, 30, 20, 50),
          child: Column(
            children: <Widget>[
              Text('Shadows on Web look incorrect',
                  style: TextStyle(fontSize: 20)),
              SizedBox(height: 10),
              Card(
                elevation: 0,
                margin: EdgeInsets.all(0),
                color: Colors.indigo[100],
                child: Container(
                  child: Center(child: Text('Material Card with elevation 0')),
                  height: 100,
                ),
              ),
              SizedBox(height: 20),
              Card(
                elevation: 5,
                margin: EdgeInsets.all(0),
                color: Colors.indigo[100],
                child: Container(
                  child: Center(child: Text('Material Card with elevation 5')),
                  height: 100,
                ),
              ),
              SizedBox(height: 20),
              Card(
                elevation: 10,
                margin: EdgeInsets.all(0),
                color: Colors.indigo[100],
                child: Container(
                  child: Center(child: Text('Material Card with elevation 10')),
                  height: 100,
                ),
              ),
              SizedBox(height: 20),
              Container(
                decoration: BoxDecoration(
                  borderRadius: BorderRadius.circular(4),
                  boxShadow: <BoxShadow>[
                    BoxShadow(
                      color: Colors.indigo.withOpacity(0.7),
                      offset: Offset(3, 4),
                      blurRadius: 6,
                      spreadRadius: 3,
                    ),
                  ],
                ),
                child: Container(
                  decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(4),
                    color: Colors.indigo[100],
                  ),
                  child: Center(
                      child: Text('Container with custom BoxShadow')),
                  height: 100,
                ),
              ),
              SizedBox(height: 20),
              Text('The fonts on WEB are also fuzzier, like too much antialias'),
            ],
          ),
        ),
      ),
    );
  }
}

Just as info: This issue is a known issue and reported here: flutter/flutter#32215