---- Minecraft Crash Report ----
// Would you like a cupcake?

Time: 7/27/14 8:25 PM
Description: There was a severe problem during mod loading that has caused the game to fail

cpw.mods.fml.common.LoaderException: java.lang.NoSuchFieldError: instance
	at cpw.mods.fml.common.LoadController.transition(LoadController.java:156)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:523)
	at cpw.mods.fml.client.FMLClientHandler.beginMinecraftLoading(FMLClientHandler.java:183)
	at MinecraftLoader.ClientHelper.startGame(ClientHelper.java:208)
	at net.minecraft.client.Minecraft.func_71384_a(Minecraft.java)
	at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:808)
	at net.minecraft.client.main.Main.main(SourceFile:101)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at net.minecraft.launchwrapper.Launch.launch(Launch.java:131)
	at net.minecraft.launchwrapper.Launch.main(Launch.java:27)
Caused by: java.lang.NoSuchFieldError: instance
	at li.cil.oc.common.Proxy.preInit(Proxy.scala:49)
	at li.cil.oc.client.Proxy.preInit(Proxy.scala:23)
	at li.cil.oc.OpenComputers$.preInit(OpenComputers.scala:42)
	at li.cil.oc.OpenComputers.preInit(OpenComputers.scala)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at cpw.mods.fml.common.FMLModContainer.handleModStateEvent(FMLModContainer.java:545)
	at sun.reflect.GeneratedMethodAccessor2.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
	at com.google.common.eventbus.EventBus.post(EventBus.java:267)
	at cpw.mods.fml.common.LoadController.sendEventToModContainer(LoadController.java:201)
	at sun.reflect.GeneratedMethodAccessor1.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at MinecraftLoader.MinecraftDummyContainer.callMethod(MinecraftDummyContainer.java:118)
	at MinecraftLoader.MinecraftDummyContainer.onModEvent(MinecraftDummyContainer.java:110)
	at cpw.mods.fml.common.LoadController.propogateStateMessage(LoadController.java)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at com.google.common.eventbus.EventHandler.handleEvent(EventHandler.java:74)
	at com.google.common.eventbus.SynchronizedEventHandler.handleEvent(SynchronizedEventHandler.java:45)
	at com.google.common.eventbus.EventBus.dispatch(EventBus.java:313)
	at com.google.common.eventbus.EventBus.dispatchQueuedEvents(EventBus.java:296)
	at com.google.common.eventbus.EventBus.post(EventBus.java:267)
	at cpw.mods.fml.common.LoadController.distributeStateMessage(LoadController.java:112)
	at cpw.mods.fml.common.Loader.loadMods(Loader.java:522)
	... 11 more


A detailed walkthrough of the error, its code path and all known details is as follows:
---------------------------------------------------------------------------------------

-- System Details --
Details:
	Minecraft Version: 1.6.4
	Operating System: Linux (amd64) version 3.15.6-200.fc20.x86_64
	Java Version: 1.7.0_65, Oracle Corporation
	Java VM Version: OpenJDK 64-Bit Server VM (mixed mode), Oracle Corporation
	Memory: 39106096 bytes (37 MB) / 236130304 bytes (225 MB) up to 4260102144 bytes (4062 MB)
	JVM Flags: 7 total; -Xmx4G -XX:UseSSE=4 -XX:+UseConcMarkSweepGC -XX:+UseCMSCompactAtFullCollection -XX:+UseParNewGC -XX:+DisableExplicitGC -XX:+AggressiveOpts
	AABB Pool Size: 0 (0 bytes; 0 MB) allocated, 0 (0 bytes; 0 MB) used
	Suspicious classes: FML and Forge are installed
	IntCache: cache: 0, tcache: 0, allocated: 0, tallocated: 0
	FML: MCP v8.11 FML v6.4.49.965 Minecraft Forge 9.11.1.965 Optifine OptiFine_1.6.4_HD_U_D1 110 mods loaded, 110 mods active
	mcp{8.09} [Minecraft Coder Pack] (minecraft.jar) Unloaded->Constructed->Pre-initialized
	FML{6.4.49.965} [Forge Mod Loader] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized
	Forge{9.11.1.965} [Minecraft Forge] (minecraftforge-9.11.1.965.jar) Unloaded->Constructed->Pre-initialized
	CodeChickenCore{0.9.0.9} [CodeChicken Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized
	Evoc{1.0.0} [Evoc] (minecraft.jar) Unloaded->Constructed->Pre-initialized
	minecraftloader{0.1} [MinecraftLoader] (minecraft.jar) Unloaded->Constructed->Pre-initialized
	NotEnoughItems{1.6.1.9} [Not Enough Items] (NotEnoughItems 1.6.1.9.jar) Unloaded->Constructed->Pre-initialized
	PowerCrystalsCore{1.1.8} [PowerCrystals Core] (PowerCrystalsCore-1.1.8-9.jar) Unloaded->Constructed->Pre-initialized
	TConstruct-Preloader{0.0.1} [Tinkers Corestruct] (minecraft.jar) Unloaded->Constructed->Pre-initialized
	AppliedEnergistics-Core{rv14.finale3} [AppliedEnergistics Core] (minecraft.jar) Unloaded->Constructed->Pre-initialized
	OpenModsCore{@VERSION@} [OpenModsCore] (minecraft.jar) Unloaded->Constructed->Pre-initialized
	DamageIndicatorsMod{2.9.2.3} [Damage Indicators] (1.6.4 DamageIndicatorsv2.9.2.3.zip) Unloaded->Constructed->Pre-initialized
	arsmagica2{1.1.2b} [Ars Magica 2] (AM2_1.1.2b.zip) Unloaded->Constructed->Pre-initialized
	AppliedEnergistics{rv14.finale3} [Applied Energistics] (appeng-rv14-finale3-mc16x.jar) Unloaded->Constructed->Pre-initialized
	ArchimedesShipsMod{1.6.4 v1.4.5} [Archimedes' Ships] (ArchimedesShips.zip) Unloaded->Constructed->Pre-initialized
	asielib{0.2.4} [asielib] (AsieLib-1.6.4-0.2.4.jar) Unloaded->Constructed->Pre-initialized
	BiblioCraft{1.5.5} [BiblioCraft] (BiblioCraft[v1.5.5].zip) Unloaded->Constructed->Pre-initialized
	Natura{2.1.14} [Natura] (Natura_mc1.6.X_2.1.14.jar) Unloaded->Constructed->Pre-initialized
	BiomesOPlenty{1.2.1} [Biomes O' Plenty] (BiomesOPlenty-universal-1.6.4-1.2.1.434.jar) Unloaded->Constructed->Pre-initialized
	BiblioWoodsBoP{1.3} [BiblioWoods Biomes O'Plenty Edition] (BiblioWoods[BiomesOPlenty][v1.3].zip) Unloaded->Constructed->Pre-initialized
	BiblioWoodsNatura{1.1} [BiblioWoods Natura Edition] (BiblioWoods[Natura][v1.1].zip) Unloaded->Constructed->Pre-initialized
	ComputerCraft{1.63} [ComputerCraft] (ComputerCraft1.63.jar) Unloaded->Constructed->Pre-initialized
	BuildCraft|Core{4.2.1} [BuildCraft] (buildcraft-A-1.6.4-4.2.1.jar) Unloaded->Constructed->Pre-initialized
	BuildCraft|Builders{4.2.1} [BC Builders] (buildcraft-A-1.6.4-4.2.1.jar) Unloaded->Constructed->Pre-initialized
	BuildCraft|Energy{4.2.1} [BC Energy] (buildcraft-A-1.6.4-4.2.1.jar) Unloaded->Constructed->Pre-initialized
	BuildCraft|Factory{4.2.1} [BC Factory] (buildcraft-A-1.6.4-4.2.1.jar) Unloaded->Constructed->Pre-initialized
	BuildCraft|Transport{4.2.1} [BC Transport] (buildcraft-A-1.6.4-4.2.1.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded{1.6.4R2.7.9} [MineFactory Reloaded] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	CoFHCore{2.0.0.5} [CoFH Core] (CoFHCore-2.0.0.5.jar) Unloaded->Constructed->Pre-initialized
	UniversalElectricity{3.1.0} [Universal Electricity] (Universal-Electricity-3.1.0.94-core.jar) Unloaded->Constructed->Pre-initialized
	ForgeMultipart{1.0.0.244} [Forge Multipart] (ForgeMultipart-universal-1.6.4-1.0.0.244.jar) Unloaded->Constructed->Pre-initialized
	ThermalExpansion{3.0.0.7} [Thermal Expansion] (ThermalExpansion-3.0.0.7.jar) Unloaded->Constructed->Pre-initialized
	OpenComputers|Core{1.0.0} [OpenComputers (Core)] (OpenComputers-MC1.6.4-1.3.2.525-universal.jar) Unloaded->Constructed->Pre-initialized
	BigReactors{0.3.4A2} [Big Reactors] (BigReactors-0.3.4A2.jar) Unloaded->Constructed->Pre-initialized
	BuildCraft|Silicon{4.2.1} [BC Silicon] (buildcraft-A-1.6.4-4.2.1.jar) Unloaded->Constructed->Pre-initialized
	CalclaviaCore{1.2.0} [Calclavia] (Calclavia-Core-1.2.0.332-universal.jar) Unloaded->Constructed->Pre-initialized
	ChickenChunks{1.3.3.4} [ChickenChunks] (ChickenChunks 1.3.3.4.jar) Unloaded->Constructed->Pre-initialized
	CoFHLoot{2.0.0.5} [CoFH Loot] (CoFHCore-2.0.0.5.jar) Unloaded->Constructed->Pre-initialized
	CoFHMasquerade{2.0.0.5} [CoFH Masquerade] (CoFHCore-2.0.0.5.jar) Unloaded->Constructed->Pre-initialized
	CoFHSocial{2.0.0.5} [CoFH Social] (CoFHCore-2.0.0.5.jar) Unloaded->Constructed->Pre-initialized
	CoFHWorld{2.0.0.5} [CoFH World] (CoFHCore-2.0.0.5.jar) Unloaded->Constructed->Pre-initialized
	OpenComputers{1.3.2.525} [OpenComputers] (OpenComputers-MC1.6.4-1.3.2.525-universal.jar) Unloaded->Constructed->Errored
	EnderStorage{1.4.3.6} [EnderStorage] (EnderStorage 1.4.3.6.jar) Unloaded->Constructed->Pre-initialized
	Mystcraft{0.10.11.00} [Mystcraft] (mystcraft-uni-1.6.4-0.10.11.00.zip) Unloaded->Constructed->Pre-initialized
	OpenMods{0.5} [OpenMods] (OpenModsLib-0.5.jar) Unloaded->Constructed->Pre-initialized
	Thaumcraft{4.1.0e} [Thaumcraft] (Thaumcraft4.1.0e.zip) Unloaded->Constructed->Pre-initialized
	OpenPeripheralCore{0.4} [OpenPeripheralCore] (OpenPeripheralCore-0.4.0.jar) Unloaded->Constructed->Pre-initialized
	computronics{0.4.1} [Computronics] (Computronics-1.6.4-0.4.1.jar) Unloaded->Constructed->Pre-initialized
	dimdoors{1.6.4-R2.2.3} [Dimensional Doors] (DimensionalDoors-2.2.3-336.jar) Unloaded->Constructed->Pre-initialized
	numina{0.1.2-55} [Numina] (Numina-1.6.2-0.1.2-55.jar) Unloaded->Constructed->Pre-initialized
	powersuits{0.10.0-91} [MachineMuse's Modular Powersuits] (ModularPowersuits-1.6.4-0.10.0-91.jar) Unloaded->Constructed->Pre-initialized
	DragonAPI{release} [DragonAPI] (DragonAPI 1.6 V19b.zip) Unloaded->Constructed->Pre-initialized
	EnderForest{beta} [Ender Forest] (EnderForest 1.6 V19b.zip) Unloaded->Constructed->Pre-initialized
	EnhancedPortals3{3.0.0_Beta-2d} [EnhancedPortals] (EnhancedPortals_3.0.0_Beta-2d.jar) Unloaded->Constructed->Pre-initialized
	EE3{0.1} [Equivalent Exchange 3] (EquivalentExchange3-1.6.4-0.1.140.jar) Unloaded->Constructed->Pre-initialized
	ExtraUtilities{1.0.3b} [Extra Utilities] (extrautils-1.0.3b.zip) Unloaded->Constructed->Pre-initialized
	FlansMod{4.1.1} [Flans Mod] (FlansMod-4.1.1.jar) Unloaded->Constructed->Pre-initialized
	NBTEdit{1.6.4.0} [In-game NBTEdit] (Forge_NBTEditv1.6.4.0.zip) Unloaded->Constructed->Pre-initialized
	inventorytweaks{1.56} [Inventory Tweaks] (InventoryTweaks-MC1.6.2-1.56-b77.jar) Unloaded->Constructed->Pre-initialized
	IronChest{5.4.1.649} [Iron Chest] (ironchest-universal-1.6.4-5.4.1.649.zip) Unloaded->Constructed->Pre-initialized
	MFR Compat Forestry Trees{1.0} [MFR Compat Forestry Trees] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MFR Compat Extra Trees{1.0} [MFR Compat Extra Trees] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatAppliedEnergistics{1.6.4R2.7.9} [MFR Compat: Applied Energistics] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatAtum{1.6.4R2.7.9} [MFR Compat: Atum] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatBackTools{1.6.4R2.7.9} [MFR Compat: BackTools] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatBuildCraft{1.6.4R2.7.9} [MFR Compat: BuildCraft] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatChococraft{1.6.4R2.7.9} [MFR Compat: Chococraft] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatExtraBiomes{1.6.4R2.7.9} [MFR Compat: ExtraBiomes] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatForestry{1.6.4R2.7.9} [MFR Compat: Forestry] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatForestryPre{1.6.4R2.7.9} [MFR Compat: Forestry (part 2)] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatForgeMicroblock{1.6.4R2.7.9} [MFR Compat: ForgeMicroblock] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatIC2{1.6.4R2.7.9} [MFR Compat: IC2] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatMystcraft{1.6.4R2.7.9} [MFR Compat: Mystcraft] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatPams{1.6.4R2.7.9} [MFR Compat: Pam's Mods] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatProjRed{1.6.4R2.7.9} [MFR Compat ProjectRed] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatRailcraft{1.6.4R2.7.9} [MFR Compat: Railcraft] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatRP2{1.6.4R2.7.9} [MFR Compat: RP2] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatSufficientBiomes{1.6.4R2.7.9} [MFR Compat: Sufficient Biomes] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatThaumcraft{1.6.4R2.7.9} [MFR Compat: Thaumcraft] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatThermalExpansion{1.6.4R2.7.9} [MFR Compat: Thermal Expansion] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatTwilightForest{1.6.4R2.7.9} [MFR Compat: TwilightForest] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatVanilla{1.6.4R2.7.9} [MFR Compat: Vanilla] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MineFactoryReloaded|CompatXyCraft{1.6.4R2.7.9} [MFR Compat: XyCraft] (MineFactoryReloaded-2.7.9-final.jar) Unloaded->Constructed->Pre-initialized
	MoarPeripherals{1.6.4-1.63-1.1} [MoarPeripherals] (MoarPeripherals-1.6.4-1.63-1.1.3.jar) Unloaded->Constructed->Pre-initialized
	MFFS{3.6.2} [Modular Force Field System] (Modular-Force-Field-System-3.6.2.68-core.jar) Unloaded->Constructed->Pre-initialized
	MyWorldGen{1.3} [MyWorldGen] (MyWorldGen-1.3.zip) Unloaded->Constructed->Pre-initialized
	NEIPlugins{1.1.0.6} [NEI Plugins] (NEIPlugins-1.1.0.6.jar) Unloaded->Constructed->Pre-initialized
	ObsidiPlates{2.0.0} [Obsidian Pressure Plates] (obsidiplates-1.6.2-universal-2.0.0.15.jar) Unloaded->Constructed->Pre-initialized
	OpenPeripheral{0.1.4} [OpenPeripheralAddons] (OpenPeripheralAddons-0.1.4.jar) Unloaded->Constructed->Pre-initialized
	OpenBlocks{1.2.8} [OpenBlocks] (OpenBlocks-1.2.8.jar) Unloaded->Constructed->Pre-initialized
	iChunUtil{2.4.0} [iChunUtil] (util^iChunUtil2.4.0.zip) Unloaded->Constructed->Pre-initialized
	PortalGun{2.0.2} [PortalGun] (PortalGun2.0.2.zip) Unloaded->Constructed->Pre-initialized
	powersuitaddons{@VERSION@} [Andrew's Modular Powersuits Addons] (powersuitaddons-1.6.4-884.jar) Unloaded->Constructed->Pre-initialized
	Redstone Arsenal{1.0.0.0} [Redstone Arsenal] (RedstoneArsenal-1.0.0.0.jar) Unloaded->Constructed->Pre-initialized
	xreliquary{1.1.2} [Xeno's Reliquary] (Reliquary-1.1.2b.jar) Unloaded->Constructed->Pre-initialized
	JAKJ_RedstoneInMotion{1.1.7} [Remain In Motion] (RemainInMotion_1.2.0.zip) Unloaded->Constructed->Pre-initialized
	JAKJ_RedstoneInMotion_HollowCarriages{1.0} [JAKJ_RedstoneInMotion_HollowCarriages] (RemainInMotion_1.2.0.zip) Unloaded->Constructed->Pre-initialized
	Waila{1.4.4} [Waila] (Waila_1.4.4b.zip) Unloaded->Constructed->Pre-initialized
	TConstruct{1.6.X_1.5.2.1} [Tinkers' Construct] (TConstruct_mc1.6.4_1.5.2.6.jar) Unloaded->Constructed->Pre-initialized
	ThaumicTinkererKami{1.0} [Thaumic Tinkerer KAMI] (ThaumicTinkererKAMI_j6.jar) Unloaded->Constructed->Pre-initialized
	ThaumicTinkerer{2.3-130} [Thaumic Tinkerer] (ThaumicTinkerer-2.3-130.jar) Unloaded->Constructed->Pre-initialized
	TMechworks{33.c001660} [Tinkers' Mechworks] (TMechworks_mc1.6.4_0.1.6.jar) Unloaded->Constructed->Pre-initialized
	TrussMod{beta} [Truss Mod] (TrussMod-beta-1.6.4-32.jar) Unloaded->Constructed->Pre-initialized
	WR-CBE|Core{1.4.0.7} [WR-CBE Core] (WR-CBE 1.4.0.7.jar) Unloaded->Constructed->Pre-initialized
	WR-CBE|Addons{1.4.0.7} [WR-CBE Addons] (WR-CBE 1.4.0.7.jar) Unloaded->Constructed->Pre-initialized
	WR-CBE|Logic{1.4.0.7} [WR-CBE Logic] (WR-CBE 1.4.0.7.jar) Unloaded->Constructed->Pre-initialized
	mod_ZanMinimap{0.9.4} [Zan's Minimap] (ZansMinimap1.6.4.zip) Unloaded->Constructed->Pre-initialized
	MineTweaker{1.6.4-2.1.2} [MineTweaker] (zMineTweaker-1.6.4-2.3.1.jar) Unloaded->Constructed->Pre-initialized
	McMultipart{1.0.0.244} [Minecraft Multipart Plugin] (ForgeMultipart-universal-1.6.4-1.0.0.244.jar) Unloaded->Constructed->Pre-initialized
	ForgeMicroblock{1.0.0.244} [Forge Microblocks] (ForgeMultipart-universal-1.6.4-1.0.0.244.jar) Unloaded->Constructed->Pre-initialized
	TConstruct Environment: DO NOT REPORT THIS CRASH! Unsupported mods in environment: optifine