fix: settle RenderTextureSceneRenderer output for sampling

Author: xen2

samples/Graphics/AnimatedModel/AnimatedModel.Game/RenderTextureSceneRenderer.cs

@@ -40,6 +40,9 @@ protected override void DrawCore(RenderContext context, RenderDrawContext drawCo
                 drawContext.CommandList.SetRenderTargetAndViewport(depthBuffer, RenderTexture);
 
                 Child?.Draw(drawContext);
+
+                // The rendered texture is meant to be sampled by the rest of the frame
+                drawContext.CommandList.ResourceBarrierTransition(RenderTexture, BarrierLayout.ShaderResource);
             }
         }
     }

sources/engine/Stride.Rendering/Rendering/Compositing/RenderTextureSceneRenderer.cs

@@ -43,6 +43,9 @@ protected override void DrawCore(RenderContext context, RenderDrawContext drawCo
                 drawContext.CommandList.SetRenderTargetAndViewport(depthBuffer, RenderTexture);
 
                 Child?.Draw(drawContext);
+
+                // The rendered texture is meant to be sampled by the rest of the frame
+                drawContext.CommandList.ResourceBarrierTransition(RenderTexture, BarrierLayout.ShaderResource);
             }
         }
     }