From 970bed62abb7d88e5bbd09b9212a7e7168322058 Mon Sep 17 00:00:00 2001 From: Hugo Locurcio Date: Sat, 23 Oct 2021 16:32:38 +0200 Subject: [PATCH] Decrease the default soft shadow quality to improve performance MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Soft shadows are relatively expensive to filter. However, with the default blur factors, it's not needed to use too many samples (unless PCSS-like shadows are used with a large size). Textures and screen-space antialiasing can also be used to mask the noise pattern effectively. On a GeForce GTX 1080, going from Medium to Low for both shadow types saves 0.2-0.4 ms of GPU time per frame in 2560×1440 resolution. This can translate to significantly higher savings on lower-end GPUs. Given how the shader works, this improves rendering performance even if lights with shadows are never used. --- doc/classes/ProjectSettings.xml | 4 ++-- servers/rendering_server.cpp | 4 ++-- 2 files changed, 4 insertions(+), 4 deletions(-) diff --git a/doc/classes/ProjectSettings.xml b/doc/classes/ProjectSettings.xml index c646380bee9..46f67933282 100644 --- a/doc/classes/ProjectSettings.xml +++ b/doc/classes/ProjectSettings.xml @@ -1699,7 +1699,7 @@ Lower-end override for [member rendering/shadows/directional_shadow/size] on mobile devices, due to performance concerns or driver support. - + Quality setting for shadows cast by [DirectionalLight3D]s. Higher quality settings use more samples when reading from shadow maps and are thus slower. Low quality settings may result in shadows looking grainy. [b]Note:[/b] The Soft Very Low setting will automatically multiply [i]constant[/i] shadow blur by 0.75x to reduce the amount of noise visible. This automatic blur change only affects the constant blur factor defined in [member Light3D.shadow_blur], not the variable blur performed by [DirectionalLight3D]s' [member Light3D.light_angular_distance]. [b]Note:[/b] The Soft High and Soft Ultra settings will automatically multiply [i]constant[/i] shadow blur by 1.5× and 2× respectively to make better use of the increased sample count. This increased blur also improves stability of dynamic object shadows. @@ -1727,7 +1727,7 @@ Lower-end override for [member rendering/shadows/shadow_atlas/size] on mobile devices, due to performance concerns or driver support. - + Quality setting for shadows cast by [OmniLight3D]s and [SpotLight3D]s. Higher quality settings use more samples when reading from shadow maps and are thus slower. Low quality settings may result in shadows looking grainy. [b]Note:[/b] The Soft Very Low setting will automatically multiply [i]constant[/i] shadow blur by 0.75x to reduce the amount of noise visible. This automatic blur change only affects the constant blur factor defined in [member Light3D.shadow_blur], not the variable blur performed by [DirectionalLight3D]s' [member Light3D.light_angular_distance]. [b]Note:[/b] The Soft High and Soft Ultra settings will automatically multiply shadow blur by 1.5× and 2× respectively to make better use of the increased sample count. This increased blur also improves stability of dynamic object shadows. diff --git a/servers/rendering_server.cpp b/servers/rendering_server.cpp index 039dbc71e34..d746476c629 100644 --- a/servers/rendering_server.cpp +++ b/servers/rendering_server.cpp @@ -2794,12 +2794,12 @@ RenderingServer::RenderingServer() { GLOBAL_DEF("rendering/shadows/directional_shadow/size", 4096); GLOBAL_DEF("rendering/shadows/directional_shadow/size.mobile", 2048); ProjectSettings::get_singleton()->set_custom_property_info("rendering/shadows/directional_shadow/size", PropertyInfo(Variant::INT, "rendering/shadows/directional_shadow/size", PROPERTY_HINT_RANGE, "256,16384")); - GLOBAL_DEF("rendering/shadows/directional_shadow/soft_shadow_quality", 3); + GLOBAL_DEF("rendering/shadows/directional_shadow/soft_shadow_quality", 2); GLOBAL_DEF("rendering/shadows/directional_shadow/soft_shadow_quality.mobile", 0); ProjectSettings::get_singleton()->set_custom_property_info("rendering/shadows/directional_shadow/soft_shadow_quality", PropertyInfo(Variant::INT, "rendering/shadows/directional_shadow/soft_shadow_quality", PROPERTY_HINT_ENUM, "Hard (Fastest),Soft Very Low (Faster),Soft Low (Fast),Soft Medium (Average),Soft High (Slow),Soft Ultra (Slowest)")); GLOBAL_DEF("rendering/shadows/directional_shadow/16_bits", true); - GLOBAL_DEF("rendering/shadows/shadows/soft_shadow_quality", 3); + GLOBAL_DEF("rendering/shadows/shadows/soft_shadow_quality", 2); GLOBAL_DEF("rendering/shadows/shadows/soft_shadow_quality.mobile", 0); ProjectSettings::get_singleton()->set_custom_property_info("rendering/shadows/shadows/soft_shadow_quality", PropertyInfo(Variant::INT, "rendering/shadows/shadows/soft_shadow_quality", PROPERTY_HINT_ENUM, "Hard (Fastest),Soft Very Low (Faster),Soft Low (Fast),Soft Medium (Average),Soft High (Slow),Soft Ultra (Slowest)"));