Hi everyone!
I’m using the Zbrush R2 Trial, but I don’t find the DynaMesh option.
I searched for it in the geometry window after that I created a polymesh 3D sphere, but I can’t see the option…
What could be happening?
Make Polymesh 3D first, then the button will be in the Geometry submenu.
In the Tool / Geometry subpalette
Attachments
There is no ZBrush 4R2 Trial at this time. The Trial is currently ZBrush 4, which does not have the DynaMesh feature. That’s why you can’t find it. 
I am not sure when a new Trial will be released. Just check every so often.
Or buy ZBrush to have access to DynaMesh today. ;)
Oh my… I haven’t saw that this trial isn’t the R2 version… 
Thank you, aurick!
Thanks, zber2 and Richard too.