Implementing PlugIn.CreatePreview, and it just seems crazy how often a preview (for a material) gets refreshed for no apparent reason. [image]

It shouldn’t. Make sure you are only changing the return value of RenderHash when something is really different.

I am not overriding that, I am only putting my data in Fields, and setting Child content, and you should be able to reproduce this in v7 if you use Rhino as current renderer, with cycles rendering previews.

Ok…but I’m not seeing crazy updates in V7. Can you give me some steps to reproduce an unnecessary update?

Sure, using 7.0.20147.12475, 05/26/2020: open v7 file > new, use no template to eliminate variables open materials panel, make sure preview pane is open make sure rhino is current renderer draw a cube create a rhino plastic material (don’t even assign it) move the cube, material preview is refresh…

https://mcneel.myjetbrains.com/youtrack/issue/RH-58767

Can’t see the linked page, but thanks for taking a look, Andy.

Hi @jdhill , I have adjusted the permissions so you should be able to see the page now. I will look into this problem later today. John

PlugIn.CreatePreview called (apparently) unnecessarily

Rhino Developer

brian (Brian Gillespie) August 4, 2020, 10:34pm 9

RH-58767 is fixed in the latest WIP

Topic		Replies	Views
RhinoCommon plug-in CreatePreview usage Developer	2	689	September 25, 2017
Wish: internal preview caching/optimization for RenderContent subclasses Rhino Developer rdk , rhcommon	13	713	November 3, 2020
Please Fix the Material Previews, Again Rendering	5	640	September 2, 2022
Thank you for fixing the Material Preview Issue : ) Rhino for Windows	2	372	March 5, 2020
BUG? The material preview icon will not render the actual colour Rhino for Windows	4	1088	April 17, 2021

PlugIn.CreatePreview called (apparently) unnecessarily

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