I use valueOpTimes for controlling Visibility Channels. Generally, visibility can only be completely on or completely off. This is not transparency we're talking about. So the visibility channel and any channel controlling it should probably have its sensitivity set to 1.0, so a click on the up or down increments will go between 0 and 1 without intermediate values.

On my main figure, I add dials for visibility of whatever clothing props and figures I conform or parent to it. On the clothing figures or props, the visibility channel (on the Body actor for figures) gets a valueOpTimes from the main figure's control for that clothing item. Simple. No mess, no fuss, and it can be saved as part of the main figure's pose.

I have not had ANY trouble in P11 with visibility of items except for a few esoteric items which were missing the key icon next to the visibility checkbox in the actor properties palette. That meant that you couldn't make the visibility channel visible and hence keyframable. I can't remember exactly what it was, and it may have even been fixed since.

@ockham, if you can show some of what you are seeing that doesn't work, such as code snippets or screenshots, that could help in troubleshooting.

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