# How to render two transparent polydata with overlapping parts？

**URL:** https://discourse.vtk.org/t/how-to-render-two-transparent-polydata-with-overlapping-parts/11172
**Category:** Support
**Created:** [April 10, 2023, 9:33am UTC](https://discourse.vtk.org/t/how-to-render-two-transparent-polydata-with-overlapping-parts/11172 "2023-04-10T09:33:58Z")
**Posts on this page:** 1
**Page:** 1

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### Author: ![Jawanz](https://discourse.vtk.org/letter_avatar_proxy/v4/letter/j/f08c70/32.png) [@Jawanz](https://discourse.vtk.org/u/Jawanz)
#### Post date: [April 10, 2023, 9:33am UTC](https://discourse.vtk.org/t/how-to-render-two-transparent-polydata-with-overlapping-parts/11172/1 "2023-04-10T09:33:58Z")

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Hello. I am rendering two transparent polydata with overlapping parts in C++.

These two polydata are 2D and have the same color and transparency, but the rendered results have deepened in the overlapping area. Is there any way to avoid color deepening