omni.rtx.spg: RTX Sensor Processing Graphs# omni.rtx.spg RTX Sensor Processing Graphs [omni.rtx.spg] Prerequisites How SPG Works Walkthrough: Grayscale Conversion of LdrColor Step 1: The CUDA Kernel Step 2: The Lua Launch Script Step 3: The USD Shader Definition Step 4: The Scene File Step 5: Run It Understanding the Architecture The Three Layers Walkthrough: Chaining Shaders – Grayscale + Invert New Concepts Step 1: The CUDA Kernel Step 2: The Lua Launch Script Step 3: The USD Shader Definition Step 4: The Scene File Step 5: Run It Known Limitations Lua cuda Module Reference dtype Constants Output Allocation Kernel Argument Wrappers Cached Computation Kernel Launch Global Variables Logging Functions Launch Script Function Signature Glossary