From 6eb7075fa102acb2a496ec4e62f8b77e7b26a947 Mon Sep 17 00:00:00 2001
From: Weizhen Huang <weizhen@blender.org>
Date: Wed, 13 Aug 2025 16:10:06 +0200
Subject: [PATCH] Fix: Cycles: `lcg_state` uninitialized before volume density
 baking

_No response_

Pull Request: https://projects.blender.org/blender/blender/pulls/144489
---
 intern/cycles/kernel/bake/bake.h | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/intern/cycles/kernel/bake/bake.h b/intern/cycles/kernel/bake/bake.h
index 51c061b238f..a31433f9c42 100644
--- a/intern/cycles/kernel/bake/bake.h
+++ b/intern/cycles/kernel/bake/bake.h
@@ -141,6 +141,8 @@ ccl_device void kernel_volume_density_evaluate(KernelGlobals kg,
   ShaderData sd;
   shader_setup_from_volume(&sd, &ray, in.object);
   sd.flag = SD_IS_VOLUME_SHADER_EVAL;
+  /* For stochastic texture sampling. */
+  sd.lcg_state = lcg_state_init(offset, 0, 0, 0x15b4f88d);
 
   /* Evaluate extinction and emission without allocating closures. */
   sd.num_closure_left = 0;