From c331bac82547b87f0dea2aef7533ca31632922e2 Mon Sep 17 00:00:00 2001
From: lachablock <lachsrb2@gmail.com>
Date: Sat, 22 May 2021 18:17:48 +1000
Subject: [PATCH] Fix models interpolating to frame 0 from a same-sprite2
 FF_SPR2ENDSTATE state

---
 src/hardware/hw_md2.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/hardware/hw_md2.c b/src/hardware/hw_md2.c
index 4c60936b2..84835d284 100644
--- a/src/hardware/hw_md2.c
+++ b/src/hardware/hw_md2.c
@@ -1586,7 +1586,12 @@ boolean HWR_DrawModel(gl_vissprite_t *spr)
 				{
 					nextFrame = (spr->mobj->frame & FF_FRAMEMASK) + 1;
 					if (nextFrame >= mod)
-						nextFrame = 0;
+					{
+						if (spr->mobj->state->frame & FF_SPR2ENDSTATE)
+							nextFrame--;
+						else
+							nextFrame = 0;
+					}
 					if (frame || !(spr->mobj->state->frame & FF_SPR2ENDSTATE))
 						nextFrame = md2->model->spr2frames[spr2].frames[nextFrame];
 					else