{"action":"created","issue":{"url":"https://api.github.com/repos/waveform80/picamera/issues/199","labels_url":"https://api.github.com/repos/waveform80/picamera/issues/199/labels{/name}","comments_url":"https://api.github.com/repos/waveform80/picamera/issues/199/comments","events_url":"https://api.github.com/repos/waveform80/picamera/issues/199/events","html_url":"https://github.com/waveform80/picamera/issues/199","id":58546197,"number":199,"title":"Overlay RGBA? Transparency not supported?","user":{"login":"jtkeyva","id":2954865,"avatar_url":"https://avatars.githubusercontent.com/u/2954865?v=3","gravatar_id":"","url":"https://api.github.com/users/jtkeyva","html_url":"https://github.com/jtkeyva","followers_url":"https://api.github.com/users/jtkeyva/followers","following_url":"https://api.github.com/users/jtkeyva/following{/other_user}","gists_url":"https://api.github.com/users/jtkeyva/gists{/gist_id}","starred_url":"https://api.github.com/users/jtkeyva/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jtkeyva/subscriptions","organizations_url":"https://api.github.com/users/jtkeyva/orgs","repos_url":"https://api.github.com/users/jtkeyva/repos","events_url":"https://api.github.com/users/jtkeyva/events{/privacy}","received_events_url":"https://api.github.com/users/jtkeyva/received_events","type":"User","site_admin":false},"labels":[{"url":"https://api.github.com/repos/waveform80/picamera/labels/enhancement","name":"enhancement","color":"84b6eb"},{"url":"https://api.github.com/repos/waveform80/picamera/labels/upstream","name":"upstream","color":"fbca04"}],"state":"open","locked":false,"assignee":null,"milestone":null,"comments":6,"created_at":"2015-02-23T06:06:03Z","updated_at":"2015-09-07T10:33:20Z","closed_at":null,"body":"The overlay feature is nice, but couldn't figure out how to use png files with portions that are transparent. Is it possible to have a png as an overlay but with areas that are cut out?\r\nThanks"},"comment":{"url":"https://api.github.com/repos/waveform80/picamera/issues/comments/138266409","html_url":"https://github.com/waveform80/picamera/issues/199#issuecomment-138266409","issue_url":"https://api.github.com/repos/waveform80/picamera/issues/199","id":138266409,"user":{"login":"waveform80","id":1076190,"avatar_url":"https://avatars.githubusercontent.com/u/1076190?v=3","gravatar_id":"","url":"https://api.github.com/users/waveform80","html_url":"https://github.com/waveform80","followers_url":"https://api.github.com/users/waveform80/followers","following_url":"https://api.github.com/users/waveform80/following{/other_user}","gists_url":"https://api.github.com/users/waveform80/gists{/gist_id}","starred_url":"https://api.github.com/users/waveform80/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/waveform80/subscriptions","organizations_url":"https://api.github.com/users/waveform80/orgs","repos_url":"https://api.github.com/users/waveform80/repos","events_url":"https://api.github.com/users/waveform80/events{/privacy}","received_events_url":"https://api.github.com/users/waveform80/received_events","type":"User","site_admin":false},"created_at":"2015-09-07T10:33:20Z","updated_at":"2015-09-07T10:33:20Z","body":"My guess is the only difference is the fact you're setting camera resolution in the second recipe (the padding stuff is unnecessary as the test PNG is already has a resolution which is a multiple of 32 x 16 blocks). Still, it just goes to demonstrate what I mentioned above: the firmware ignores the alpha channel of image data in renderers."}}