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-rw-r--r--include/mbgl/style/layers/custom_layer.hpp2
1 files changed, 2 insertions, 0 deletions
diff --git a/include/mbgl/style/layers/custom_layer.hpp b/include/mbgl/style/layers/custom_layer.hpp
index d3867e2c4f..87bce06f41 100644
--- a/include/mbgl/style/layers/custom_layer.hpp
+++ b/include/mbgl/style/layers/custom_layer.hpp
@@ -33,6 +33,8 @@ struct CustomLayerRenderParameters {
* any assumptions about the GL state (other than that the correct context is active). It may
* make changes to the state, and is not required to reset values such as the depth mask, stencil
* mask, and corresponding test flags to their original values.
+ * Make sure that you are drawing your fragments with a z value of 1 to take advantage of the
+ * opaque fragment culling in case there are opaque layers above your custom layer.
*/
using CustomLayerRenderFunction = void (*)(void* context, const CustomLayerRenderParameters&);