Unfortunately there is no possibility to get semi-transparent images with the platform now. We'll consider implementation of background-saving parameter into the "Chalk and Charcoal" method.
Thank you for your attention. We'll be glad to recieve any other feedback on platform usage.

Hi, Slowly.

Bug with "auto start" function in embed code is fixed now.

Cool service, thnx
handle_img_tag('http://pho.to/get-shared-image/E0AFB4CF-1ADE-488B-A5DC-21D1FB2080F5.gif', false)