# Rendering time on structured grid

**URL:** https://discourse.vtk.org/t/rendering-time-on-structured-grid/5446
**Category:** Development
**Created:** [March 26, 2021, 8:36am UTC](https://discourse.vtk.org/t/rendering-time-on-structured-grid/5446 "2021-03-26T08:36:00Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Guillaume\_Gillet](https://discourse.vtk.org/user_avatar/discourse.vtk.org/guillaume_gillet/32/3114_2.png) [@Guillaume\_Gillet](https://discourse.vtk.org/u/Guillaume_Gillet)
#### Post date: [March 26, 2021, 8:36am UTC](https://discourse.vtk.org/t/rendering-time-on-structured-grid/5446/1 "2021-03-26T08:36:00Z")

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Hello, so i’m using VtkStructuredGrid to render 3D grids and i need to make rendering speed tests to compare vtk with another tool, but i saw after a few tests that when i blanck a part of the cells like i need to do with the data i collect, the rendering time is way longer than when i only render the grid alone, i would like to know first why? and then if you know any solution to faster render a structured grid, i thought of using a decimation filter, but when i use the geometryfilter on my grid it transforms the cells into points only and i still don’t know why?  
Thanks for any help that you can provide me!