1.17 Snapshots have weird lines in between blocks, lots of noise, and lag. This does NOT happen to me on 1.16. This also happens to my sister in 1.17 and 1.16. My JVM Arguments for snapshots are -Xmx16G -XX:+UnlockExperimentalVMOptions -XX:+UseParNewGC -XX:G1NewSizePercent=30 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=38 -XX:G1HeapRegionSize=192M and my JVM arguments for regular Minecraft are -d64 -client -Xmx16G -Xms4G -Xmn2000m -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:ParallelGCThreads=16 -XX:+UseNUMA -XX:+UseParNewGC -XX:+UseBiasedLocking -XX:G1NewSizePercent=30 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=38 -XX:G1HeapRegionSize=192M -XX:+UseStringDeduplication -XX:+UseCodeCacheFlushing . My sister's JVM Arguments are -d64 -client -Xmx6G -Xms3G -Xmn500m -XX:+UnlockExperimentalVMOptions -XX:+DisableExplicitGC -XX:ParallelGCThreads=10 -XX:+UseSerialGC -XX:+AlwaysPreTouch -XX:G1NewSizePercent=30 -XX:G1ReservePercent=20 -XX:MaxGCPauseMillis=100 -XX:G1HeapRegionSize=48M -XX:+UseCodeCacheFlushing . My PC specs are CPU: Intel Core i9-10980HK, 32 GB RAM, GPU: (No integrated graphics enabled) Nvidia RTX 3070 Laptop GPU. My sister's PC specs are: GPU: Intel Core i7-8750H. 16 GB RAM, GPU: (Integrated Graphics enabled but NVIDIA card is used for Minecraft) Nvidia GTX 1050 Ti.
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This does happen in 1.16 but only if you have antialiasing on and if V-sync is forced on in the Nvidia control panel. Turning this off only fixes 1.16 and not 1.17
Avoma
Duplicate of MC-1794.