while not a major issue per-se, the sheer number of times the engine has to jump back in memory and backfill data in a given class can add up. First run of... many.,
A new method to GuiBitmapCtrl in order to set "named textures" as the image displayed in script.
Those "named textures" are created in two places from script (not c++) that I know: as part of GuiOffscreenCanvas (targetName field) and, more useful, as the target of a PostEffect using target = "#name" (the '#' is not used for this method).