Why do models have black edges scale from 1 to 0.3
this is mycode
It seems your codepen is broken. Here is a working live example:
The black borders are semi-transparent artifacts. You can avoid them by
a) modifying your texture or
b) by using alphaTest instead of setting transparent to true.
Updated fiddle: https://jsfiddle.net/ckb7vfuw/
thank very much