Set Transparency on Feature Map

There was a previous posting regarding the setting of a transparency on feature maps:

http://support.geocortex.com/SupportForums/Thread.aspx?pageid=0&mid=2&ItemID=2&thread=47747

That was back at the beginning of 2014.

Has there been any movement on this? Every time I try to set a transparency value, Essentials truncates it.

Walter