diff --git a/docs/_static/images/action1.jpg b/docs/_static/images/action1.jpg index 59790a3..49620d5 100644 Binary files a/docs/_static/images/action1.jpg and b/docs/_static/images/action1.jpg differ diff --git a/docs/_static/images/action2.jpg b/docs/_static/images/action2.jpg index 4f3ade3..e07c33f 100644 Binary files a/docs/_static/images/action2.jpg and b/docs/_static/images/action2.jpg differ diff --git a/docs/_static/images/action3.png b/docs/_static/images/action3.png index ef510cf..8da8da4 100644 Binary files a/docs/_static/images/action3.png and b/docs/_static/images/action3.png differ diff --git a/docs/_static/images/aggregation.png b/docs/_static/images/aggregation.png index dbcd9b3..a3061cd 100644 Binary files a/docs/_static/images/aggregation.png and b/docs/_static/images/aggregation.png differ diff --git a/docs/_static/images/async.png b/docs/_static/images/async.png index 11547de..b91cbaf 100644 Binary files a/docs/_static/images/async.png and b/docs/_static/images/async.png differ diff --git a/docs/_static/images/batch_reserve.png b/docs/_static/images/batch_reserve.png index 49c8623..3731e93 100644 Binary files a/docs/_static/images/batch_reserve.png and b/docs/_static/images/batch_reserve.png differ diff --git a/docs/_static/images/batch_tree.png b/docs/_static/images/batch_tree.png index b914c2c..e366eee 100644 Binary files a/docs/_static/images/batch_tree.png and b/docs/_static/images/batch_tree.png differ diff --git a/docs/_static/images/concepts_arch.png b/docs/_static/images/concepts_arch.png index baaa7f8..e256af1 100644 Binary files a/docs/_static/images/concepts_arch.png and b/docs/_static/images/concepts_arch.png differ diff --git a/docs/_static/images/concepts_arch2.png b/docs/_static/images/concepts_arch2.png index 58d8c62..3489d0d 100644 Binary files a/docs/_static/images/concepts_arch2.png and b/docs/_static/images/concepts_arch2.png differ diff --git a/docs/_static/images/marl.png b/docs/_static/images/marl.png index cf368d5..6dfda16 100644 Binary files a/docs/_static/images/marl.png and b/docs/_static/images/marl.png differ diff --git a/docs/_static/images/pipeline.png b/docs/_static/images/pipeline.png index 5cbfaa3..960adbd 100644 Binary files a/docs/_static/images/pipeline.png and b/docs/_static/images/pipeline.png differ diff --git a/docs/_static/images/tianshou-logo.png b/docs/_static/images/tianshou-logo.png index fa31829..ebb93ac 100644 Binary files a/docs/_static/images/tianshou-logo.png and b/docs/_static/images/tianshou-logo.png differ diff --git a/docs/_static/images/tic-tac-toe.png b/docs/_static/images/tic-tac-toe.png index 071fa9f..4792c09 100644 Binary files a/docs/_static/images/tic-tac-toe.png and b/docs/_static/images/tic-tac-toe.png differ