From 59205533b291bfb32f50c65b0375877ce250e2f9 Mon Sep 17 00:00:00 2001 From: Magnus Norddahl Date: Mon, 26 Aug 2024 02:59:03 +0200 Subject: [PATCH] Bias the trace end point to reduce shadow acne --- wadsrc/static/shaders/scene/light_shadow.glsl | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/wadsrc/static/shaders/scene/light_shadow.glsl b/wadsrc/static/shaders/scene/light_shadow.glsl index 7ca90d173..19cdadc0e 100644 --- a/wadsrc/static/shaders/scene/light_shadow.glsl +++ b/wadsrc/static/shaders/scene/light_shadow.glsl @@ -184,7 +184,7 @@ vec2 getVogelDiskSample(int sampleIndex, int sampleCount, float phi) float traceShadow(vec4 lightpos, int quality, float softShadowRadius) { - vec3 origin = pixelpos.xyz; + vec3 origin = pixelpos.xyz + vWorldNormal.xyz; vec3 target = lightpos.xyz + 0.01; // nudge light position slightly as Doom maps tend to have their lights perfectly aligned with planes vec3 direction = normalize(target - origin);