Redraw GUI in an offline processing context

Hi all.

Perhaps somebody will able to help me.

I have a custom GUI element based on five different bitmaps. These bitmaps changes according to a knob position. A parameter assigned to the knob is continuous (in range 0.0 to 1.0).

The bitmaps change via sending data in the process() method (works as VU meter in the AGain example). It works well in real-time, but when my plugin is used in an offline processing context (Direct Offline Processing feature) the bitmap doesn’t change. Is there a way to redraw the bitmap in the offline mode?