Vault GOCA pattern fills look pixellated in Vault

Issue

Doc1 produced AFP using GOCA pattern fills looks awful in Vault, both in the GIF mode and when rendered to PDF.  What can I do about this?

Cause

Doc1 produced AFP using GOCA pattern fills looks awful in Vault, both in the GIF mode and when rendered to PDF.  What can I do about this?

Resolution

UPDATED: September 18, 2017
One solution is to go back to Doc1 and try to find a shade that looks optimal.

However if this is not feasible. builds/6.1M0p0132 has a new profile.ini setting that can swap out Goca patterns in the document with RGB colors.
 
Basically when the AFP sets a pattern symbol for fill
 
2804 GSPT Set Pattern Symbol
 
Vault will look for the corresponding profile setting GocaMapPattern<N> for a colour to replace it with. The value of N is between 1 to 15. 

In the case that prompted this the AFP  sets pattern 4 so it looks for the setting GocaMapPattern4=<colour>.
 
By default it renders the pattern as before. 
 
The colour is a hex RGB value. Note that you can choose to map it to a grey like 808080 or to a colour like green 80E080.
 
There is still some artifacting in bitmap output but much less when compared with pattern fills.

i.e.,

[someprofile]
GocaMapPattern4=808080 turns the pattern fill to a nice gray.