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Fix: EEVEE-Next: Shadow: Clip Rays inside the light shape

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This fix the noise issue caused by shadow tracing.
This commit is contained in:
Clément Foucault
2024-05-18 17:56:28 +02:00
parent e0b3dee35a
commit 6a0fb5c35f
1 changed files with 4 additions and 10 deletions
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14
source/blender/draw/engines/eevee_next/shaders/eevee_shadow_tracing_lib.glsl
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@@ -248,12 +248,6 @@ ShadowRayPunctual shadow_ray_generate_punctual(LightData light, vec2 random_2d,
direction = point_on_light_shape - lP;
direction = shadow_ray_above_horizon_ensure(direction, lNg, shape_radius);
/* Clip the ray to not cross the near plane.
* Scale it so that it encompass the whole cube (with a safety margin). */
float clip_distance = clip_near + 0.001;
float ray_length = reduce_max(abs(direction));
direction *= saturate((ray_length - clip_distance) / ray_length);
}
else {
float dist;
@@ -272,11 +266,11 @@ ShadowRayPunctual shadow_ray_generate_punctual(LightData light, vec2 random_2d,
direction = point_on_light_shape - lP;
direction = shadow_ray_above_horizon_ensure(direction, lNg, shape_radius);
/* Clip the ray to not cross the light shape. */
float clip_distance = clip_near + 0.001;
direction *= saturate((dist - clip_distance) / dist);
}
/* Clip the ray to not cross the near plane.
* Avoid traces that starts on tiles that have not been queried, creating noise. */
float clip_distance = clip_near + shape_radius * 0.5;
direction *= saturate(1.0 - clip_distance * inversesqrt(length_squared(direction)));
vec3 shadow_position = light_local_data_get(light).shadow_position;
/* Compute the ray again. */