Some filter effects specification review comments

Hello, Here are some comments on the current filter specification, Kind regards, Vincent feCustomElement https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/publish/Filters.html#feCus tomElement Except for feCustomElement, there is a predefined set of filters rather than defining a language for filter processing. Ultimately, we think this will limit usage and should indeed be augmented with a filter language. Hit testing https://dvcs.w3.org/hg/FXTF/raw-file/tip/filters/publish/Filters.html#filte rs-in-css The filter is defined to have no effect on hit testing when clicking into the final rendered image. This is a concern: highly distorting filters will basically create situations where the hit testing is completely at odds with what the viewer sees. For example, in an extreme case, a filter can blow away the image entirely, but it will still respond to hit testing. Has the group discussed possible solutions to this problem? Vincent.