Can you explain why this is necessary? A lot of documentation suggests just carefully naming and place dlls to make sure that mesa is loaded - and this seems to work. Does pointing VTK at Mesa’s SDK/libs result in a better (or faster) connection?
Our deployment scenario is one where most of our customer have sufficient support for OpenGL2, but some won’t and we want the code to switch to mesa in those limited cases. We do NOT want to deal with 2 different builds of VTK for this.