image gets shaky as hell with small markers

[giaaaacomo]

hi! in a project i'm currently working on i need to use small markers (2.2 cm) with custom patternRatio (0.8), but the image rendered in the webpage is really unstable, even with the marker really close to the camera (~25 cm) tilts and shakes alot. do you have any suggestions about how to make it stabler? can't find anything relevant anywhere.
setting a higher resolution seems to help, but as stated in #392, it bugs the whole image.