R custom visual: how to grey out before refresh (rather than showing white)

Hi All,

Does anyone know whether it is possible to grey out an R custom visual when refreshing / refiltering?

At the moment the visual goes white (i.e., blank). An example of how this would work is here: https://plot.ly/r/shinyapp-explore-diamonds/. Notice that changing parameters on their GUI there causes the visual to grey out for a few seconds, rather than blanking it completely.

This feature would be useful when comparing data and multiple refiltering on the same visual. The blank visual makes it more difficult to keep track of what one is doing, since the whole tile goes blank for a few seconds—greying out may be more sensible.

Regards to all,

Phillip