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Clarify that LAB_TASK_LEVEL only gates C++ setup, not shader behavior #491

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Clarify that LAB_TASK_LEVEL only gates C++ setup, not shader behavior #491

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9 changes: 9 additions & 0 deletions en/courses/18_Ray_tracing/00_Overview.adoc
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Expand Up @@ -46,6 +46,15 @@ At the top of the C++ file, note the following variable:

At certain intervals, you will be instructed to update this variable and re-build to verify the effect of key changes, no need to write new code.

NOTE: `LAB_TASK_LEVEL` only gates setup on the *C++ side* (acceleration structure
building/binding, TLAS animation, and similar host-side scaffolding). It does not select or
switch shaders. Shadows, transparency, and reflections only appear once you've filled in the
corresponding `// TASKxx` sections in `38_ray_tracing.slang` yourself, following each chapter's
instructions - raising `LAB_TASK_LEVEL` alone won't change what you see on screen. If you'd
rather see the finished result first, `38_ray_tracing_complete.slang` is the reference solution;
copy it over `38_ray_tracing.slang` (the build always compiles the latter) to build the
fully-featured shader without writing any of the tasks.

== Chapters in this series

- xref:./00_Overview.adoc[Overview]
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