Create a simplified Falcor material system in slang test (#2721)

* Duplicate an example of differentiating Falcor's material system

* Add a second BSDF

* WIP: update test; grad didn't pass through

* Finalize test

---------

Co-authored-by: Lifan Wu <lifanw@nvidia.com>

1 files changed, 8 insertions, 0 deletions

diff --git a/tests/autodiff/material/MaterialSystem.slang b/tests/autodiff/material/MaterialSystem.slang
new file mode 100644
index 000000000..5e733fad9
--- /dev/null
+++ b/tests/autodiff/material/MaterialSystem.slang
@@ -0,0 +1,8 @@
+//TEST_IGNORE_FILE:
+
+__exported import IMaterial;
+
+IMaterial createMaterialClassConformance(int type, float3 value)
+{
+    return createDynamicObject<IMaterial, float3>(type, value);
+}