three.js - threejs setClearColor setting the opacity to 0 although the background is not there -


i want set background color blank, using renderer.setclearcolor (0xff0000, 0)[setclearcolor ]:changing three.js background transparent or other color, setting opacity 0, although background not there, on page, there no model

i have added photo instructions,but reputation not enough， please check link :https://github.com/shunzizhan/threejsdemo/wiki/three-scene


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