Looking for Xvnc that has the RENDER extensions enabled. Only one i've found is the realvnc's one, but i'm unable to compile.
I'm working on ubuntu jaunty amd64.
Here's the status of all VNC servers I know about:
These provide a VNC server module to an existing Xserver. As such, if you can configure an underlying Xserver with Xrender support, you might be able to use one of these.
The following VNC Xservers do not provide XRENDER support insofar as I can tell: