Hello Haeyong, we did once solve the problem with help of an Image background. In case of dynamically rendering the scene with a moving cursor we used the image backround for scene rendering. This way we were able to render quite huge scenes dynamically without stuttering. I have uploaded a piece of sample code (DynamicDrawingOpenSG_5.cxx) to:
http://drop.io/OpenSG_RenderEngine However, it is only OpenSG 1.8 and I have not look into it for quite some time. But maybe you can extract something useful from it. Best, Johannes
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