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Recently I just made a new Minecraft modpack within the .minecraft folder (works perfectly fine with other modpacks I have made), and added GLSL shaders mod, MrMeepz's shaders (with Forge 1.8.11.14.4.1563) and worldedit. Loading up MC to its menu is fine, but as soon as I join a server or world, the screen goes blank and sends me back to the launcher, crashing the game. Here is the crash report:

---- Minecraft Crash Report ----

WARNING: coremods are present:
Contact their authors BEFORE contacting forge

// On the bright side, I bought you a teddy bear!

Time: 4/30/16 4:27 PM
Description: Tesselating block model

java.lang.IndexOutOfBoundsException: Index: 2, Size: 1
at java.util.ArrayList.rangeCheck(ArrayList.java:653)
at java.util.ArrayList.get(ArrayList.java:429)
at net.minecraft.client.renderer.vertex.VertexFormat.func_177348_c(SourceFile:126)
at net.minecraftforge.client.model.pipeline.VertexLighterFlat.processQuad(VertexLighterFlat.java:162)
at net.minecraftforge.client.model.pipeline.QuadGatheringTransformer.put(QuadGatheringTransformer.java:38)
at net.minecraftforge.client.model.pipeline.LightUtil.putBakedQuad(LightUtil.java:104)
at net.minecraft.client.renderer.block.model.BakedQuad.pipe(BakedQuad.java:10)
at net.minecraftforge.client.model.pipeline.ForgeBlockModelRenderer.render(ForgeBlockModelRenderer.java:100)
at net.minecraftforge.client.model.pipeline.ForgeBlockModelRenderer.func_178265_a(ForgeBlockModelRenderer.java:65)
at net.minecraft.client.renderer.BlockModelRenderer.func_178267_a(BlockModelRenderer.java:44)
at net.minecraft.client.renderer.BlockModelRenderer.func_178259_a(BlockModelRenderer.java:34)
at net.minecraft.client.renderer.BlockRendererDispatcher.func_175018_a(BlockRendererDispatcher.java:95)
at net.minecraft.client.renderer.chunk.RenderChunk.func_178581_b(RenderChunk.java:178)
at net.minecraft.client.renderer.chunk.ChunkRenderWorker.func_178474_a(SourceFile:78)
at net.minecraft.client.renderer.chunk.ChunkRenderDispatcher.func_178505_b(SourceFile:120)
at net.minecraft.client.renderer.RenderGlobal.func_174970_a(RenderGlobal.java:882)
at shadersmod.client.ShadersRender.setupTerrain(ShadersRender.java:57)
at net.minecraft.client.renderer.EntityRenderer.func_175068_a(EntityRenderer.java:1267)
at net.minecraft.client.renderer.EntityRenderer.func_78471_a(EntityRenderer.java:1210)
at net.minecraft.client.renderer.EntityRenderer.func_78480_b(EntityRenderer.java:1035)
at net.minecraft.client.Minecraft.func_71411_J(Minecraft.java:1055)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:345)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

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

-- Head --
Stacktrace:
at java.util.ArrayList.rangeCheck(ArrayList.java:653)
at java.util.ArrayList.get(ArrayList.java:429)
at net.minecraft.client.renderer.vertex.VertexFormat.func_177348_c(SourceFile:126)
at net.minecraftforge.client.model.pipeline.VertexLighterFlat.processQuad(VertexLighterFlat.java:162)
at net.minecraftforge.client.model.pipeline.QuadGatheringTransformer.put(QuadGatheringTransformer.java:38)
at net.minecraftforge.client.model.pipeline.LightUtil.putBakedQuad(LightUtil.java:104)
at net.minecraft.client.renderer.block.model.BakedQuad.pipe(BakedQuad.java:10)
at net.minecraftforge.client.model.pipeline.ForgeBlockModelRenderer.render(ForgeBlockModelRenderer.java:100)
at net.minecraftforge.client.model.pipeline.ForgeBlockModelRenderer.func_178265_a(ForgeBlockModelRenderer.java:65)

-- Block model being tesselated --
Details:
Block: minecraft:double_stone_slab[seamless=false,variant=stone]
Block location: World: (0,12,-16), Chunk: (at 0,0,0 in 0,-1; contains blocks 0,0,-16 to 15,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Using AO: true
Stacktrace:
at net.minecraft.client.renderer.BlockModelRenderer.func_178267_a(BlockModelRenderer.java:44)
at net.minecraft.client.renderer.BlockModelRenderer.func_178259_a(BlockModelRenderer.java:34)

-- Block being tesselated --
Details:
Block type: ID #43 (tile.stoneSlab // net.minecraft.block.BlockDoubleStoneSlab)
Block data value: 0 / 0x0 / 0b0000
Block location: World: (0,12,-16), Chunk: (at 0,0,0 in 0,-1; contains blocks 0,0,-16 to 15,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Stacktrace:
at net.minecraft.client.renderer.BlockRendererDispatcher.func_175018_a(BlockRendererDispatcher.java:95)
at net.minecraft.client.renderer.chunk.RenderChunk.func_178581_b(RenderChunk.java:178)
at net.minecraft.client.renderer.chunk.ChunkRenderWorker.func_178474_a(SourceFile:78)
at net.minecraft.client.renderer.chunk.ChunkRenderDispatcher.func_178505_b(SourceFile:120)
at net.minecraft.client.renderer.RenderGlobal.func_174970_a(RenderGlobal.java:882)
at shadersmod.client.ShadersRender.setupTerrain(ShadersRender.java:57)
at net.minecraft.client.renderer.EntityRenderer.func_175068_a(EntityRenderer.java:1267)
at net.minecraft.client.renderer.EntityRenderer.func_78471_a(EntityRenderer.java:1210)

-- Affected level --
Details:
Level name: MpServer
All players: 1 total; [EntityPlayerSP['BinaryGreen'/1579, l='MpServer', x=0.50, y=15.50, z=-2.50]]
Chunk stats: MultiplayerChunkCache: 255, 255
Level seed: 0
Level generator: ID 00 - default, ver 1. Features enabled: false
Level generator options:
Level spawn location: 0.00,15.00,-3.00 - World: (0,15,-3), Chunk: (at 0,0,13 in 0,-1; contains blocks 0,0,-16 to 15,255,-1), Region: (0,-1; contains chunks 0,-32 to 31,-1, blocks 0,0,-512 to 511,255,-1)
Level time: 175325137 game time, 11891443 day time
Level dimension: 0
Level storage version: 0x00000 - Unknown?
Level weather: Rain time: 0 (now: false), thunder time: 0 (now: false)
Level game mode: Game mode: survival (ID 0). Hardcore: false. Cheats: false
Forced entities: 1 total; [EntityPlayerSP['BinaryGreen'/1579, l='MpServer', x=0.50, y=15.50, z=-2.50]]
Retry entities: 0 total; []
Server brand: BungeeCord (git:BungeeCord-Bootstrap:1.9-SNAPSHOT:b6b015f:1142) <- Spigot
Server type: Non-integrated multiplayer server
Stacktrace:
at net.minecraft.client.multiplayer.WorldClient.func_72914_a(WorldClient.java:351)
at net.minecraft.client.Minecraft.func_71396_d(Minecraft.java:2502)
at net.minecraft.client.Minecraft.func_99999_d(Minecraft.java:367)
at net.minecraft.client.main.Main.main(SourceFile:120)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at net.minecraft.launchwrapper.Launch.launch(Launch.java:135)
at net.minecraft.launchwrapper.Launch.main(Launch.java:28)

-- System Details --
Details:
Minecraft Version: 1.8
Operating System: Windows 8.1 (amd64) version 6.3
Java Version: 1.8.0_25, Oracle Corporation
Java VM Version: Java HotSpot(TM) 64-Bit Server VM (mixed mode), Oracle Corporation
Memory: 165837712 bytes (158 MB) / 422498304 bytes (402 MB) up to 1060372480 bytes (1011 MB)
JVM Flags: 6 total; -XX:HeapDumpPath=MojangTricksIntelDriversForPerformance_javaw.exe_minecraft.exe.heapdump -Xmx1G -XX:+UseConcMarkSweepGC -XX:+CMSIncrementalMode -XX:-UseAdaptiveSizePolicy -Xmn128M
IntCache: cache: 0, tcache: 0, allocated: 13, tallocated: 95
FML: MCP v9.10 FML v8.0.99.99 Minecraft Forge 11.14.4.1563 4 mods loaded, 4 mods active
States: 'U' = Unloaded 'L' = Loaded 'C' = Constructed 'H' = Pre-initialized 'I' = Initialized 'J' = Post-initialized 'A' = Available 'D' = Disabled 'E' = Errored
UCHIJA mcp{9.05} [Minecraft Coder Pack] (minecraft.jar)
UCHIJA FML{8.0.99.99} [Forge Mod Loader] (forge-1.8-11.14.4.1563.jar)
UCHIJA Forge{11.14.4.1563} [Minecraft Forge] (forge-1.8-11.14.4.1563.jar)
UCHIJA worldedit{6.1} [WorldEdit] (worldedit-forge-mc1.8-6.1.jar)
Loaded coremods (and transformers):
GL info: ' Vendor: 'Intel' Version: '4.0.0 - Build 10.18.10.3345' Renderer: 'Intel(R) HD Graphics 4000'
Launched Version: 1.8-forge1.8-11.14.4.1563
LWJGL: 2.9.1
OpenGL: Intel(R) HD Graphics 4000 GL version 4.0.0 - Build 10.18.10.3345, Intel
GL Caps: Using GL 1.3 multitexturing.
Using GL 1.3 texture combiners.
Using framebuffer objects because OpenGL 3.0 is supported and separate blending is supported.
Shaders are available because OpenGL 2.1 is supported.
VBOs are available because OpenGL 1.5 is supported.

Using VBOs: No
Is Modded: Definitely; Client brand changed to 'fml,forge'
Type: Client (map_client.txt)
Resource Packs: []
Current Language: English (US)
Profiler Position: N/A (disabled)

I do not know what is wrong? Does anyone know how to fix this issue?

Do you have a dedicated GPU? Intel HD is terrible for Shaders.

As for the error, you need to read the mod author's instructions in the first post of the Shader's Mod thread.

http://www.minecraftforum.net/forums/mapping-and-modding/minecraft-mods/1286604-shaders-mod-updated-by-karyonix#c1