1. A concise explanation of the problem you're experiencing.
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there are some bias(twill) on screen when i use shadow.(turn off the viewer.shadow is normal )。those bias(twill) appear on 3dtile data。
picture there

besides, it was often occurred that 【DeveloperError: Expected width to be greater than 0, actual value was 0 Error】.
I guess it matter with my vast data(10GB 3dtilsets) , so i set differert configration 【maximumScreenSpaceError、maximumMemoryUsage、skipLevelOfDetail、immediatelyLoadDesiredLevelOfDetail、dynamicScreenSpaceErrorDensity】
i tried use differed configration computes,it alway happend。
2. A minimal code example. If you've found a bug, this helps us reproduce and repair it.
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3. Context. Why do you need to do this? We might know a better way to accomplish your goal.
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none
4. The Cesium version you're using, your operating system and browser.
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cesium1.60 / chrome / windows10
anyone can give me suggestions and i will really appreciate that!