1 files changed, 6 insertions, 3 deletions

diff --git a/src/llr/llr.c b/src/llr/llr.c
index 74cfaed..e5242e7 100644
--- a/src/llr/llr.c
+++ b/src/llr/llr.c
@@ -36,11 +36,14 @@ static bool init_ibl(LLR* renderer) {
   return true;
 }
 
-// TODO: Why is this done lazily here? Do it when the environment light is
-//  created.
-//
 /// Compute irradiance and prefiltered environment maps for the light if they
 /// have not been already computed.
+///
+/// This is done lazily here, and not when the light is created, because we
+/// need an IBL instance to do this and it is more convenient for the public
+/// API to create lights without worrying about those details. It also makes the
+/// public API cheaper, since the maps are only computed when they are actually
+/// needed.
 static bool set_up_environment_light(LLR* renderer, EnvironmentLight* light) {
   assert(renderer);
   assert(light);