diff --git a/help/shaders/DrawColoredParticles_DrawFX.sdsl b/help/shaders/DrawColoredParticles_DrawFX.sdsl
index ab9d7d7..6ec6470 100644
--- a/help/shaders/DrawColoredParticles_DrawFX.sdsl
+++ b/help/shaders/DrawColoredParticles_DrawFX.sdsl
@@ -1,7 +1,7 @@
 
 shader DrawColoredParticles_DrawFX : VS_PS_Base, ShaderUtils
 {
-    StructuredBuffer<float4> ParticlesBuffer;
+    StructuredBuffer<float3> ParticlesBuffer;
     StructuredBuffer<float4> ColorBuffer;
 
     cbuffer PerFrame
@@ -19,7 +19,7 @@ shader DrawColoredParticles_DrawFX : VS_PS_Base, ShaderUtils
     stage override void VSMain() 
     {
         uint id = streams.VertexID;
-        streams.PositionWS = ParticlesBuffer[id];
+        streams.PositionWS = float4(ParticlesBuffer[id], 1);
         streams.Color = ColorBuffer[id];
     }