diff --git a/src/base/base_async.c b/src/base/base_async.c
new file mode 100644
index 00000000..46cbe09a
--- /dev/null
+++ b/src/base/base_async.c
@@ -0,0 +1,22 @@
+////////////////////////////////////////////////////////////
+//~ Bootstrap
+
+void BootstrapAsync(void)
+{
+    /* TODO: Dynamic lane counts */
+    DispatchWave(Lit("Async"), 4, AsyncEntryPoint, 0);
+}
+
+////////////////////////////////////////////////////////////
+//~ Async ops
+
+void OnAsyncTick(AsyncFunc *func)
+{
+}
+
+////////////////////////////////////////////////////////////
+//~ Async worker
+
+void AsyncEntryPoint(WaveLaneCtx *lane)
+{
+}
diff --git a/src/base/base_async.h b/src/base/base_async.h
new file mode 100644
index 00000000..f6d60553
--- /dev/null
+++ b/src/base/base_async.h
@@ -0,0 +1,19 @@
+////////////////////////////////////////////////////////////
+//~ Async types
+
+typedef void AsyncFunc(WaveLaneCtx *lane);
+
+////////////////////////////////////////////////////////////
+//~ Bootstrap
+
+void BootstrapAsync(void);
+
+////////////////////////////////////////////////////////////
+//~ Async ops
+
+void OnAsyncTick(AsyncFunc *func);
+
+////////////////////////////////////////////////////////////
+//~ Async worker
+
+void AsyncEntryPoint(WaveLaneCtx *lane);
diff --git a/src/base/base_inc.h b/src/base/base_inc.h
index f8cc1737..21e78bdd 100644
--- a/src/base/base_inc.h
+++ b/src/base/base_inc.h
@@ -25,6 +25,7 @@
 # include "base_bitbuff.h"
 # include "base_resource.h"
 # include "base_controller.h"
+# include "base_async.h"
 #elif IsLanguageG
 # include "base_shader.gh"
 #endif
@@ -46,6 +47,7 @@
 # include "base_bitbuff.c"
 # include "base_resource.c"
 # include "base_controller.c"
+# include "base_async.c"
 #endif
 
 //- Include base_win32
diff --git a/src/base/base_win32/base_win32.c b/src/base/base_win32/base_win32.c
index cd8d5c20..514b3309 100644
--- a/src/base/base_win32/base_win32.c
+++ b/src/base/base_win32/base_win32.c
@@ -320,6 +320,9 @@ i32 W32_Main(void)
         BootstrapResources(ctx.embedded_strings_count, ctx.embedded_strings);
     }
 
+    /* Bootstrap async */
+    BootstrapAsync();
+
     /* Bootstrap layers */
     if (!Atomic32Fetch(&g->panicking))
     {
diff --git a/src/glyph_cache/glyph_cache.c b/src/glyph_cache/glyph_cache.c
index 1f0294ad..8ba0d2a5 100644
--- a/src/glyph_cache/glyph_cache.c
+++ b/src/glyph_cache/glyph_cache.c
@@ -5,7 +5,7 @@ GC_State GC = ZI;
 
 void GC_BootStrap(void)
 {
-    // OnAsync(GC_AsyncTick);
+    OnAsyncTick(GC_AsyncTick);
 }
 
 ////////////////////////////////////////////////////////////
@@ -79,6 +79,10 @@ GC_Run GC_RunFromString(Arena *arena, String str, GC_FontKey font, f32 font_size
         }
     }
 
+    if (uncached_codepoints.len > 0)
+    {
+    }
+
     f32 baseline_pos = 0;
     result.rects = PushStructs(arena, GC_RunRect, ready_glyphs_count);
     result.rects_count = ready_glyphs_count;
@@ -130,6 +134,22 @@ GC_Run GC_RunFromString(Arena *arena, String str, GC_FontKey font, f32 font_size
 
 void GC_AsyncTick(WaveLaneCtx *lane)
 {
+    TempArena scratch = BeginScratchNoConflict();
+    GC_WorkerState *w = &GC.worker_state;
+
+    /* Flatten cmds */
+    // if (lane->idx == 0)
+    // {
+    //     Lock lock = LockE();
+    //     {
+
+    //     }
+    //     Unlock(&lock);
+    // }
+
+    WaveSync(lane);
+
+    EndScratch(scratch);
 }
 
 
diff --git a/src/glyph_cache/glyph_cache.h b/src/glyph_cache/glyph_cache.h
index 37744432..af15e15d 100644
--- a/src/glyph_cache/glyph_cache.h
+++ b/src/glyph_cache/glyph_cache.h
@@ -9,13 +9,6 @@ Struct(GC_FontKey)
 ////////////////////////////////////////////////////////////
 //~ Glyph types
 
-Struct(GC_GlyphDesc)
-{
-    GC_FontKey font;
-    f32 font_size;
-    u32 codepoint;
-};
-
 Struct(GC_Glyph)
 {
     GC_Glyph *next;
@@ -42,6 +35,20 @@ Struct(GC_GlyphBin)
     GC_Glyph *first;
 };
 
+Struct(GC_GlyphDesc)
+{
+    GC_FontKey font;
+    f32 font_size;
+    u32 codepoint;
+};
+
+// Struct(GC_GlyphDescChunk)
+// {
+//     GC_GlyphDescChunk *next;
+//     u64 descs_count;
+//     GC_GlyphDesc *descs;
+// };
+
 ////////////////////////////////////////////////////////////
 //~ Run types
 
@@ -73,13 +80,48 @@ Struct(GC_Run)
     b32 ready;
 };
 
+////////////////////////////////////////////////////////////
+//~ Cmd types
+
+// Enum(GC_CmdKind)
+// {
+//     GC_CmdKind_None,
+//     GC_CmdKind_LoadGlyphs
+// };
+
+Struct(GC_Cmd)
+{
+    GC_Glyph *glyph;
+};
+
+Struct(GC_CmdChunk)
+{
+    GC_CmdChunk *next;
+
+    u64 cmds_count;
+    GC_Cmd *cmds;
+};
+
 ////////////////////////////////////////////////////////////
 //~ State
 
+Struct(GC_WorkerState)
+{
+    u64 cmds_count;
+    GC_Cmd *cmds;
+};
+
 Struct(GC_State)
 {
     Mutex glyphs_mutex;
     GC_GlyphBin glyph_bins[16384];
+
+    Mutex submitted_cmds_mutex;
+    u64 submitted_cmds_count;
+    GC_CmdChunk *first_submitted_cmd_chunk;
+    GC_CmdChunk *last_submitted_cmd_chunk;
+
+    GC_WorkerState worker_state;
 } extern GC;
 
 ////////////////////////////////////////////////////////////
diff --git a/src/gpu/gpu_dx12/gpu_dx12_core.c b/src/gpu/gpu_dx12/gpu_dx12_core.c
index 015c232d..1c1ae1d6 100644
--- a/src/gpu/gpu_dx12/gpu_dx12_core.c
+++ b/src/gpu/gpu_dx12/gpu_dx12_core.c
@@ -332,7 +332,7 @@ void G_Bootstrap(void)
     //     DispatchWave(name, 1, G_D12_WorkerEntry, (void *)(u64)kind);
     // }
 
-    DispatchWave(Lit("Gpu collection worker"), 1, G_D12_CollectionWorkerEntry, 0);
+    DispatchWave(Lit("Gpu collection worker"), 1, G_D12_CollectionWorkerEntryPoint, 0);
 
     EndScratch(scratch);
 }
@@ -1067,9 +1067,11 @@ G_ResourceHandle G_PushTextureEx(G_ArenaHandle arena_handle, G_TextureResourceDe
         d3d_desc.MipLevels             = MaxI32(desc.mip_levels, 1);
         d3d_desc.SampleDesc.Count      = 1;
         d3d_desc.SampleDesc.Quality    = 0;
-        d3d_desc.Flags                |= D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS * AnyBit(desc.flags, G_ResourceFlag_AllowShaderReadWrite);
-        d3d_desc.Flags                |= D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET    * AnyBit(desc.flags, G_ResourceFlag_AllowRenderTarget);
-        d3d_desc.Flags                |= D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL    * AnyBit(desc.flags, G_ResourceFlag_AllowDepthStencil);
+        d3d_desc.Flags                |= D3D12_RESOURCE_FLAG_ALLOW_UNORDERED_ACCESS     * AnyBit(desc.flags, G_ResourceFlag_AllowShaderReadWrite);
+        d3d_desc.Flags                |= D3D12_RESOURCE_FLAG_ALLOW_RENDER_TARGET        * AnyBit(desc.flags, G_ResourceFlag_AllowRenderTarget);
+        d3d_desc.Flags                |= D3D12_RESOURCE_FLAG_ALLOW_DEPTH_STENCIL        * AnyBit(desc.flags, G_ResourceFlag_AllowDepthStencil);
+        d3d_desc.Flags                |= D3D12_RESOURCE_FLAG_ALLOW_SIMULTANEOUS_ACCESS  * (desc.initial_layout == G_Layout_Simultaneous);
+
 
         u64 alloc_size = 0;
         u64 alloc_align = 0;
@@ -2842,7 +2844,7 @@ void G_CommitBackbuffer(G_ResourceHandle backbuffer_handle, i32 vsync)
 
 /* TODO: Move this to common */
 
-void G_D12_CollectionWorkerEntry(WaveLaneCtx *lane)
+void G_D12_CollectionWorkerEntryPoint(WaveLaneCtx *lane)
 {
     for (;;)
     {
diff --git a/src/gpu/gpu_dx12/gpu_dx12_core.h b/src/gpu/gpu_dx12/gpu_dx12_core.h
index c96b55cb..ea5198f3 100644
--- a/src/gpu/gpu_dx12/gpu_dx12_core.h
+++ b/src/gpu/gpu_dx12/gpu_dx12_core.h
@@ -472,4 +472,4 @@ G_D12_StagingRegionNode *G_D12_PushStagingRegion(G_D12_CmdList *cl, u64 size);
 ////////////////////////////////////////////////////////////
 //~ Collection worker
 
-void G_D12_CollectionWorkerEntry(WaveLaneCtx *lane);
+void G_D12_CollectionWorkerEntryPoint(WaveLaneCtx *lane);