From 4fb784b97fb9b5ee35f82bda54eaa20d8012cd60 Mon Sep 17 00:00:00 2001
From: Casey Bianco-Davis <caseycasey739@gmail.com>
Date: Mon, 15 Sep 2025 18:41:00 +0200
Subject: [PATCH] Fix #142691: Grease Pencil: `Reset Vertex Color` obstructs
 materials

The default value for the `vertex_color` attribute is `0.0f` not `1.0f`
so the `Reset Vertex Color` operator should set zero, to no obstruct
the base material.

Candidate for backport to 4.5 LTS.

Pull Request: https://projects.blender.org/blender/blender/pulls/146277
---
 .../editors/grease_pencil/intern/grease_pencil_vertex_paint.cc  | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/source/blender/editors/grease_pencil/intern/grease_pencil_vertex_paint.cc b/source/blender/editors/grease_pencil/intern/grease_pencil_vertex_paint.cc
index ab088502f4b..1ec33f01870 100644
--- a/source/blender/editors/grease_pencil/intern/grease_pencil_vertex_paint.cc
+++ b/source/blender/editors/grease_pencil/intern/grease_pencil_vertex_paint.cc
@@ -444,7 +444,7 @@ static wmOperatorStatus grease_pencil_vertex_paint_reset_exec(bContext *C, wmOpe
           info,
           use_selection_mask,
           [&](const ColorGeometry4f & /*color*/) -> ColorGeometry4f {
-            return ColorGeometry4f(1.0, 1.0, 1.0, 1.0);
+            return ColorGeometry4f(0.0f, 0.0f, 0.0f, 0.0f);
           });
       any_changed.store(any_changed | changed, std::memory_order_relaxed);
       return;