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[Bug]: pcolormesh passes alpha value down to colormap instead of alpha blending

topic: color/alpha

topic: color/color & colormaps

topic: pcolor/pcolormesh

Status: Open.

#29761 In matplotlib/matplotlib;

· aw32 opened on Mar 16, 2025

[ENH]: nested volumes with one <code>ax.voxels</code> call using <code>alpha</code>

New feature

topic: color/alpha

topic: mplot3d

Status: Open.

#26106 In matplotlib/matplotlib;

· jamesbraza opened on Jun 11, 2023

[Bug]: alpha array-type not working with RGB image in imshow()

Difficulty: Mediumhttps://matplotlib.org/devdocs/devel/contribute.html#good-first-issues https://matplotlib.org/devdocs/devel/contribute.html#good-first-issues

Good first issueOpen a pull request against these issues if there are no active ones! Open a pull request against these issues if there are no active ones!

status: confirmed bug

topic: color/alpha

topic: images

Status: Open.

#26092 In matplotlib/matplotlib;

· patquem opened on Jun 8, 2023

[Bug]: Axes.grid(color) ignores alpha

status: confirmed bug

topic: color/alpha

topic: ticks axis labels

Status: Open.

#22231 In matplotlib/matplotlib;

· mreiche opened on Jan 14, 2022

PDF backend can now do alpha on hatches.

backend: pdf

backend: svg

New feature

status: needs rebase

status: waiting for other PR

status: work in progress

topic: color/alpha

Status: Draft (not ready).

matplotlib/matplotlibnumber 17049

#17049 In matplotlib/matplotlib;

· mnmelo opened on Apr 6, 2020

·

future releases

Hatch alpha not preserved in SVG or PDF

backend: pdf

backend: svg

topic: color/alpha

Status: Open.

#16883 In matplotlib/matplotlib;

· mnmelo opened on Mar 23, 2020

·

future releases

pcolorimage/pcolorfast silently drops alpha

keepItems to be ignored by the "Stale" Github Action Items to be ignored by the "Stale" Github Action

topic: color/alpha

Status: Open.

#13328 In matplotlib/matplotlib;

· anntzer opened on Jan 30, 2019

Partially transparent markers with edges are rendered differently by agg, pdf and svg backends.

backend: pdf

backend: svg

keepItems to be ignored by the "Stale" Github Action Items to be ignored by the "Stale" Github Action

topic: color/alpha

topic: markers

Status: Open.

#10035 In matplotlib/matplotlib;

· anntzer opened on Dec 18, 2017

·

future releases

Agg alpha image compositor differs from Matplotlib's software image compositor

keepItems to be ignored by the "Stale" Github Action Items to be ignored by the "Stale" Github Action

topic: color/alpha

Status: Open.

#8847 In matplotlib/matplotlib;

· anntzer opened on Jul 8, 2017

·

future releases

Internally dropping use of separate alpha value

API: consistency

keepItems to be ignored by the "Stale" Github Action Items to be ignored by the "Stale" Github Action

topic: color/alpha

Status: Open.

#7430 In matplotlib/matplotlib;

· anntzer opened on Nov 8, 2016

·

future releases

Alternative compositing methods

Difficulty: Hardhttps://matplotlib.org/devdocs/devel/contribute.html#good-first-issues https://matplotlib.org/devdocs/devel/contribute.html#good-first-issues

keepItems to be ignored by the "Stale" Github Action Items to be ignored by the "Stale" Github Action

New feature

topic: color/alpha

Status: Open.

#6210 In matplotlib/matplotlib;

· wavexx opened on Mar 23, 2016

·

future releases

Transparency, color mixing, gamma &amp; linear color space ?

backend: agg

keepItems to be ignored by the "Stale" Github Action Items to be ignored by the "Stale" Github Action

topic: color/alpha

Status: Open.

#5949 In matplotlib/matplotlib;

· gvinterhalter opened on Jan 31, 2016

·

future releases