can you provide an more interactive example

[jiqimaogou]

all example is static, no interactive operation. no any interactive widget in demo.

for example, we render an rectangle on AnnotationOverlayCalculator, and click an button we want to change the color of the render target at runtime.

[mgyong]

@jiqimaogou There was a previous similar question #18 related to changing the color for hair segmentation. We would love to get such an example from the community