From 77e0571f7c77e8516a37ea2544440527e17cd42d Mon Sep 17 00:00:00 2001
From: turanszkij <turanszkij@gmail.com>
Date: Wed, 24 Jan 2018 15:58:39 +0000
Subject: [PATCH] fix in parallax occlusion mapping

---
 WickedEngine/objectHF.hlsli | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/WickedEngine/objectHF.hlsli b/WickedEngine/objectHF.hlsli
index 34846874f..6d2860273 100644
--- a/WickedEngine/objectHF.hlsli
+++ b/WickedEngine/objectHF.hlsli
@@ -135,7 +135,7 @@ inline void ParallaxOcclusionMapping(inout float2 UV, in float3 V, in float3x3 T
 	}
 	float2 prevTCoords = currentTextureCoords + dtex;
 	float nextH = heightFromTexture - curLayerHeight;
-	float prevH = xDisplacementMap.SampleGrad(sampler_linear_wrap, prevTCoords, derivX, derivY).r - curLayerHeight + layerHeight;
+	float prevH = 1 - xDisplacementMap.SampleGrad(sampler_linear_wrap, prevTCoords, derivX, derivY).r - curLayerHeight + layerHeight;
 	float weight = nextH / (nextH - prevH);
 	float2 finalTexCoords = prevTCoords * weight + currentTextureCoords * (1.0 - weight);
 	UV = finalTexCoords;