Draw Shaded Preview Geometry mode is very slow

Hi, since the few last Rhino5 release the shaded mode in grasshopper became very slow...I am still using 0.8.0066 with Rhino Version 5.0 (5.1.20801.1108, 08/01/2012)

Is this a Rhino issue ? or Grasshopper issue? Does the new Grasshopper release remedy that?

thx

Replies to This Discussion

Permalink Reply by David Rutten on August 6, 2012 at 3:02pm

There's no difference in the way 0.9+ draws meshes. What display mode are you using in Rhino5?

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by raf2205 on August 6, 2012 at 3:33pm

hello david, I am using the "standard" shaded display...not customized

That's weird - I thought that I would not be alone with that issue. One thing I am sure is that it appears since the 3 last Rhino5 release... I am working on the same definition since a few weeks..

To be more precise the shaded display is very slow, and doesn't display wire.

I will try to explore a bit more and give you more info.

thx

Permalink Reply by David Rutten on August 10, 2012 at 6:58am

Jeff LaSor (our in-house display guru and OGL wizard) has been working on the Rhino5 shading pipeline lately. I think he's both trying to add more feature and optimize the stuff that's already there. This may well be a temporary problem.

I'll run some tests in the latest Rhino5 beta to compare it to Rhino4 display performance.

David Rutten

david@mcneel.com

Poprad, Slovakia

Permalink Reply by raf2205 on August 12, 2012 at 2:38pm

I will also try to send you file where I had display issue.

thx

Permalink Reply by Carl Christofferson on November 5, 2013 at 2:18am

Has it gotten better for you raf?

I just started working in Rhino 5 and now I have the same problem. Shadings that used to be no problem to show for my computer now take several minutes to generate...

If i bake the geometry then i can view everything fine, but when it is shaded in grasshopper everything slows down enormously.

(Just noticed this thread was a year older than i thought first. I have everything up to date for now).

Permalink Reply by Nathanael Maschke on January 28, 2014 at 10:08pm

I've just had a similar issue. (I think it's solved now)

In Grasshopper go to File > Preferences > Viewport

Choosing the "Rhino preview meshes" option is 1000 times faster for me than the "Coarse preview meshes"

At least for my computer configuration this works soooo much better. I think this option should be checked by default.

Permalink Reply by David Rutten on January 29, 2014 at 2:38am

That's really weird, because the coarse meshes have just about the lowest possible settings.

Can you upload a pair of 3dm and gh files that show this?

David Rutten

david@mcneel.com

Permalink Reply by Ben Raines on July 15, 2014 at 12:54am

Thanks for this Forum! I had a crazy slow down in my performance (from snappy/real time to unusably slow) and this was the setting that seemed to fix things in an instant. I was trying to adjust some other settings and I must have bumped this box by accident. I thought 'corse' would speed things up but it did just the opposite. 'rhino preview meshes' is the way to go for certain.

If I had to guess I would say that 'course' might be running in the CPU and 'rhino preview meshes' is in the GPU? The difference is dramataic. I would love to post an example file, but its a commerical work-for-hire so I really can't quite do that.

Permalink Reply by David Rutten on July 15, 2014 at 1:16am

Meshes aren't made on the GPU. This still makes no sense to me. Can you at least tell us what your 3DM file mesh settings are? And some vague description of the sort of geometry that you are making (lofts, boxes, single trimmed planar surfaces, complex breps with many facets, etc)?

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