diff --git a/ClassicalSharp/Blocks/BlockInfo.cs b/ClassicalSharp/Blocks/BlockInfo.cs
index 492c2027e..594326f37 100644
--- a/ClassicalSharp/Blocks/BlockInfo.cs
+++ b/ClassicalSharp/Blocks/BlockInfo.cs
@@ -62,6 +62,7 @@ namespace ClassicalSharp {
 		/// <summary> Lava style 'swimming'/'bobbing' interaction when player collides. </summary>
 		public const byte LiquidLava = 6;
 		
+		/// <summary> Rope/Ladder style climbing interaction when player collides. </summary>
 		public const byte ClimbRope = 7;
 	}
 	
diff --git a/ClassicalSharp/GraphicsAPI/Direct3D9Api.cs b/ClassicalSharp/GraphicsAPI/Direct3D9Api.cs
index 48ba7f174..c586b2482 100644
--- a/ClassicalSharp/GraphicsAPI/Direct3D9Api.cs
+++ b/ClassicalSharp/GraphicsAPI/Direct3D9Api.cs
@@ -89,7 +89,7 @@ namespace ClassicalSharp.GraphicsAPI {
 		}
 
 		Compare[] compareFuncs;
-		Compare alphaTestFunc;
+		Compare alphaTestFunc = Compare.Always;
 		int alphaTestRef;
 		public override void AlphaTestFunc(CompareFunc func, float value) {
 			alphaTestFunc = compareFuncs[(int)func];
@@ -99,7 +99,8 @@ namespace ClassicalSharp.GraphicsAPI {
 		}
 
 		Blend[] blendFuncs;
-		Blend srcBlendFunc, dstBlendFunc;
+		Blend srcBlendFunc = Blend.One;
+		Blend dstBlendFunc = Blend.Zero;
 		public override void AlphaBlendFunc(BlendFunc srcFunc, BlendFunc dstFunc) {
 			srcBlendFunc = blendFuncs[(int)srcFunc];
 			dstBlendFunc = blendFuncs[(int)dstFunc];
@@ -252,7 +253,7 @@ namespace ClassicalSharp.GraphicsAPI {
 			device.SetRenderState(RenderState.ColorWriteEnable, flags);
 		}
 
-		Compare depthTestFunc;
+		Compare depthTestFunc = Compare.LessEqual;
 		public override void DepthTestFunc(CompareFunc func) {
 			depthTestFunc = compareFuncs[(int)func];
 			device.SetRenderState(RenderState.ZFunc, (int)depthTestFunc);
diff --git a/src/Client/D3D9Api.c b/src/Client/D3D9Api.c
index 340794950..6f5ad47a7 100644
--- a/src/Client/D3D9Api.c
+++ b/src/Client/D3D9Api.c
@@ -355,7 +355,7 @@ void Gfx_SetAlphaTest(bool enabled) {
 	D3D9_SetRenderState((UInt32)enabled, D3DRS_ALPHATESTENABLE, "D3D9_SetAlphaTest");
 }
 
-D3DCMPFUNC d3d9_alphaTestFunc = 0;
+D3DCMPFUNC d3d9_alphaTestFunc = D3DCMP_ALWAYS;
 Int32 d3d9_alphaTestRef = 0;
 void Gfx_SetAlphaTestFunc(Int32 compareFunc, Real32 refValue) {
 	d3d9_alphaTestFunc = d3d9_compareFuncs[compareFunc];
@@ -372,8 +372,8 @@ void Gfx_SetAlphaBlending(bool enabled) {
 	D3D9_SetRenderState((UInt32)enabled, D3DRS_ALPHABLENDENABLE, "D3D9_SetAlphaBlending");
 }
 
-D3DBLEND d3d9_srcBlendFunc = 0;
-D3DBLEND d3d9_dstBlendFunc = 0;
+D3DBLEND d3d9_srcBlendFunc = D3DBLEND_ONE;
+D3DBLEND d3d9_dstBlendFunc = D3DBLEND_ZERO;
 void Gfx_SetAlphaBlendFunc(Int32 srcBlendFunc, Int32 dstBlendFunc) {
 	d3d9_srcBlendFunc = d3d9_blendFuncs[srcBlendFunc];
 	D3D9_SetRenderState(d3d9_srcBlendFunc, D3DRS_SRCBLEND, "D3D9_SetAlphaBlendFunc_Src");
@@ -405,7 +405,7 @@ void Gfx_SetDepthTest(bool enabled) {
 	D3D9_SetRenderState((UInt32)enabled, D3DRS_ZENABLE, "D3D9_SetDepthTest");
 }
 
-D3DCMPFUNC d3d9_depthTestFunc = 0;
+D3DCMPFUNC d3d9_depthTestFunc = D3DCMP_LESSEQUAL;
 void Gfx_SetDepthTestFunc(Int32 compareFunc) {
 	d3d9_depthTestFunc = d3d9_compareFuncs[compareFunc];
 	D3D9_SetRenderState(d3d9_alphaTestFunc, D3DRS_ZFUNC, "D3D9_SetDepthTestFunc");
@@ -528,7 +528,7 @@ void Gfx_DrawVb_IndexedTris_Range(Int32 verticesCount, Int32 startVertex) {
 }
 
 void Gfx_DrawIndexedVb_TrisT2fC4b(Int32 verticesCount, Int32 startVertex) {
-	ReturnCode hresult = IDirect3DDevice9_DrawIndexedPrimitive(device, D3DPT_TRIANGLELIST, 
+	ReturnCode hresult = IDirect3DDevice9_DrawIndexedPrimitive(device, D3DPT_TRIANGLELIST,
 		startVertex, 0, verticesCount, 0, verticesCount >> 1);
 	ErrorHandler_CheckOrFail(hresult, "D3D9_DrawIndexedVb_TrisT2fC4b");
 }