I asked if the roi-cut of the volumerender-like body could be reversed? making the panel visible outside and invisible inside. I studied the code, or not, thanks for the support, thanks!
As shown in the following figure, add two lines of code in the red box, or not. ???!
pic1|690x354 
vtkmrmlannotationroid pairs like have inside out flag, but also should have outside in flag, but no, is it
We don’t have that feature exposed in the UI. You would need to provide a custom shader something like what’s described below. It’s possible but not integrated in the app.
Thank you very much, I wish you a happy working life! 
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