flash of image before fading up

[helenvarley]

i've just watched the recording of last night's performance, and observed that often (maybe always?) there is a flash of an image before i fade it up to appear on the stage. this is what happens:

i place the image (prop or other media) on the stage and, before turning on the lightbulb, i put the opacity slider to the bottom so that i can fade the prop in. i turn on the light bulb, and the image is not visible because it's faded out. then i start to fade it in - but at the moment when i start to move the opactity slider up, there is a tiny flash of the image at full opacity.

i have just tried this several times, & it in fact happens every time, even if the opacity is not set to completely transparent: as soon as you start to increase the slider, there is a micro-second flash of the full image before it fades up.

i will put up an example of this when i have time. it is actually quite disconcerting in situations like yesterday's performance, where i was doing this a lot, changing the opacity of black and white images, & there keep being these tiny flashes.

[elisadcg]

True I didn' t notice during the show but now I check the recording and I agree.

[helenvarley]

merci elisa. here also an example from me, showing that it happens every time, whether it's from completely transparent or not - although now that i look at it uploaded here as a gif, the flash is actually now always as noticeable, as it is in UpStage. @webdev604 - please try it on the stage yourself to see what is happening in the live event.