There was a problem running the Spectre "depth_texture_main.dart" example in Dart version 26274.
I ran the code unmodified from https://github.com/johnmccutchan/spectre.
Chromium message: The page at 127.0.0.1:3030 says: Could not run DepthTexture: Illegal argument(s): Model cannot be rendered. See console.
Console message: ... Could not run DepthTexture: Illegal argument(s): Model cannot be rendered.
0 Model.Model (package:spectre/src/spectre_example_ui/model.dart:35:7)
...