Issue capture a screenshot of a mask rendered on a picture

[AGENCEPIXIES]

Hi, great job, it's an amazing plugin ! I have been using it for a snapchat-like project. The idea is to apply a mask with the facedeformer (like in your examples : Iron Man...) et to take several screenshots to generate a gif. My issue is that the mask keeps returning me a transparent png. I tried with the simple js function "canvas.toDataURL("image/png")" and with the plugin dom-to-image (https://github.com/tsayen/dom-to-image). Both return me an empty png. Do you have any idea/solution to get an nice screenshot of the mask on the picture ?

Thank you very much ! Hugo