"Course Preview Meshes" causes incredibly slow geometry preview

Hi all,

I have noticed that grasshopper has become incredibly slow when previewing (even the most basic) geometry. If preview is turned off the calculations themselves seem to work at appropriate speeds however if it has to preview the geometry it can take minutes just setting a Brep from rhino geometry. If I change the settings to "Rhino Preview Meshes" in viewport settings it seems to 100% fix the problem, however each new file defaults to "coarse preview meshes"... thus I need to change the setting every time I begin a new definition. Is there a computer graphics setting that may be causing this problem? Are others having this issue?

Replies to This Discussion

Permalink Reply by Max Malein on February 20, 2015 at 2:29am

Same thing happened to me!

Yesterday I updated kangaroo to the latest version but preview was still fine. It went crazy slow after I attached t-spline generated surface to grasshopper. I don't know if those things are interconnected in any way but those were the only changes in my configuration before everything gone bad.

Changing to high quality preview fixes the problem though. Thanks for your tip Eric.