As suggested by @carlgnash at my last post, I created a version with pure white background and shadows.
If you like this logo and want to use it, you have to add some attribution below it:
please add:
@rmp/3d-steem-logo-with-white-background
or
@rmp
or
when you use it at steemit.com at least ' created by @rmp '
But don't use it as avatar pic!