Artifacts on shadow map projector shadows #441

New issue

Closed

opened 2026-10-05 18:46:02 +00:00 by Hemiva · 0 comments

Hemiva commented

2026-10-05 18:46:02 +00:00

Environment

Version: 1.1.0.1
Channel: Slipstream Beta
OS: Microsoft Windows 11 64-bit (Build 22621.4317)
CPU: Intel(R) Core(TM) i5-9400 CPU @ 2.90GHz (2904.01 MHz)
Memory: 16314 MB
GPU: AMD Radeon RX 7600
GPU driver: 32.0.31041.1004
Vulkan: 1.4.349; ray tracing: enabled
VRAM: used 3237/6420 MB (cap auto, OS 7133, reserve 713) tracked 3067 fixed 1305 slack 278 swap 20 ovh 151 (unattributed 105) room 4851 | ladder 0/39
VRAM by category: tex 448 geom 928 scene 720 cull 117 targets 148 probes 153 shadow 187 staging 1 part 3 ui 176 texenc 87
VRAM overhead: ovh 151 MB = pad 46 (600 allocs @256K) + driver 0 (no driver report) + untracked 0 + ? 105; min 101; slack vram 278 sys 255
Display: swapchain 1618x1000 BGRA8/sRGB fifo x3 (20 MB); monitors 1, window on 2560x1080@75Hz scale 1.00, HDR off
Window: 1618x1000
Grid: Second Life Main Grid (Agni)
Region: Baltimare
Settings: AlchemyRenderTonemapType=0; RenderDeferredSSAO=1; RenderDepthOfField=0; RenderFPSLimit=0; RenderFSAAType=0; RenderFarClip=128; RenderHiDPI=0; RenderMaxTextureResolution=2048; RenderMaxVideoMemoryMB=0; RenderMirrors=0; RenderQualityPerformance=4; RenderReflectionProbeCount=128; RenderReflectionProbeDetail=1; RenderReflectionProbeLevel=2; RenderReflectionProbeResolution=128; RenderScreenSpaceReflections=0; RenderShadowDetail=2; RenderTransparentWater=1; RenderVKAOStandard=1; RenderVKAlphaShadingRate=0; RenderVKGodRays=0; RenderVKOpaqueShadingRate=0; RenderVKProjectorShadows=1; RenderVKRayTracing=1; RenderVKRenderScale=1; RenderVKShadowResolution=1024; RenderVKSunShadows=1; RenderVKTAA=0; RenderVKTextureCompression=4; RenderVKUpscaler=0; RenderVSyncEnable=1; RenderVolumeLODFactor=3; UIScaleFactor=1;

Description

In certain occasions, shadows cast by projectors can produce weird artifacts on the surface of objects. The artifacts aren't alleviated by FSR or anti-aliasing.

Reproduction steps

It's very occasional. I haven't seen a way to consistently reproduce it, even while shining the same projector light on the same object.

### Environment Version: 1.1.0.1 Channel: Slipstream Beta OS: Microsoft Windows 11 64-bit (Build 22621.4317) CPU: Intel(R) Core(TM) i5-9400 CPU @ 2.90GHz (2904.01 MHz) Memory: 16314 MB GPU: AMD Radeon RX 7600 GPU driver: 32.0.31041.1004 Vulkan: 1.4.349; ray tracing: enabled VRAM: used 3237/6420 MB (cap auto, OS 7133, reserve 713) tracked 3067 fixed 1305 slack 278 swap 20 ovh 151 (unattributed 105) room 4851 | ladder 0/39 VRAM by category: tex 448 geom 928 scene 720 cull 117 targets 148 probes 153 shadow 187 staging 1 part 3 ui 176 texenc 87 VRAM overhead: ovh 151 MB = pad 46 (600 allocs @256K) + driver 0 (no driver report) + untracked 0 + ? 105; min 101; slack vram 278 sys 255 Display: swapchain 1618x1000 BGRA8/sRGB fifo x3 (20 MB); monitors 1, window on 2560x1080@75Hz scale 1.00, HDR off Window: 1618x1000 Grid: Second Life Main Grid (Agni) Region: Baltimare Settings: AlchemyRenderTonemapType=0; RenderDeferredSSAO=1; RenderDepthOfField=0; RenderFPSLimit=0; RenderFSAAType=0; RenderFarClip=128; RenderHiDPI=0; RenderMaxTextureResolution=2048; RenderMaxVideoMemoryMB=0; RenderMirrors=0; RenderQualityPerformance=4; RenderReflectionProbeCount=128; RenderReflectionProbeDetail=1; RenderReflectionProbeLevel=2; RenderReflectionProbeResolution=128; RenderScreenSpaceReflections=0; RenderShadowDetail=2; RenderTransparentWater=1; RenderVKAOStandard=1; RenderVKAlphaShadingRate=0; RenderVKGodRays=0; RenderVKOpaqueShadingRate=0; RenderVKProjectorShadows=1; RenderVKRayTracing=1; RenderVKRenderScale=1; RenderVKShadowResolution=1024; RenderVKSunShadows=1; RenderVKTAA=0; RenderVKTextureCompression=4; RenderVKUpscaler=0; RenderVSyncEnable=1; RenderVolumeLODFactor=3; UIScaleFactor=1; ### Description In certain occasions, shadows cast by projectors can produce weird artifacts on the surface of objects. The artifacts aren't alleviated by FSR or anti-aliasing. ### Reproduction steps It's very occasional. I haven't seen a way to consistently reproduce it, even while shining the same projector light on the same object.

SlipstreamViewer_61CVy3HOOB.mp4

3.4 MiB

Hemiva added the

triage

bug

labels

2026-10-05 18:46:02 +00:00