From 6bf0e9dbb1c68c183cf48ee2c7c0ca10c53f9075 Mon Sep 17 00:00:00 2001
From: Miguel Pozo <pragma37>
Date: Mon, 27 Jan 2020 17:36:50 +0100
Subject: Fix particle instance modifier generating NaN polygons in some cases

Particles that don't exist should not be used, for example due to a
density texture.

Differential Revision: https://developer.blender.org/D6561
---
 source/blender/modifiers/intern/MOD_particleinstance.c | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'source')

diff --git a/source/blender/modifiers/intern/MOD_particleinstance.c b/source/blender/modifiers/intern/MOD_particleinstance.c
index 49bb8691764..f4c2e78d1ac 100644
--- a/source/blender/modifiers/intern/MOD_particleinstance.c
+++ b/source/blender/modifiers/intern/MOD_particleinstance.c
@@ -164,6 +164,9 @@ static bool particle_skip(ParticleInstanceModifierData *pimd, ParticleSystem *ps
     if (pa->alive == PARS_DEAD && (pimd->flag & eParticleInstanceFlag_Dead) == 0) {
       return true;
     }
+    if (pa->flag & (PARS_UNEXIST | PARS_NO_DISP)) {
+      return true;
+    }
   }
 
   if (pimd->particle_amount == 1.0f) {
-- 
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