I’ve run into a problem with transparency in the P2D renderer. When rendering an image in PG, the transparent pixels somehow blend into the background. I know I can use blendMode(REPLACE), but then the transparent pixels replace all the non-transparent pixels. Is there a way to render images with tr…

Hello @Abhyudaya_Singh , This may be related: Very weird stuff going on with colors and transparency with the P2D renderer Add support for pre-multiplied alpha · Issue #3391 · processing/processing · GitHub :)

Hi, thanks for replay. I know this isn’t an issue in JAVA2D. But the thing is, it’s very slow, and I’m also using shaders. Is there really no way to fix this problem without using third-party libraries?

P2D transparency issue

Processing Coding Questions

glv April 11, 2026, 3:41pm 2

Hello @Abhyudaya_Singh ,

This may be related:

Very weird stuff going on with colors and transparency with the P2D renderer
Add support for pre-multiplied alpha · Issue #3391 · processing/processing · GitHub

:)

Topic		Replies	Views
Very weird stuff going on with colors and transparency with the P2D renderer Coding Questions	8	320	February 24, 2023
Issue with alpha in P2D Renderer Coding Questions	2	192	November 17, 2023
PGraphics weird transparency issue Coding Questions	10	268	July 6, 2023
P2D vs JAVA2D Source-over alpha problems Coding Questions	4	589	April 2, 2021
What's the right approach to draw in / overlay PGraphics with transparency? Coding Questions	4	1263	November 1, 2018

P2D transparency issue

Related topics