Unity HDRP Mask Map Packer

I made a little editor extension to pack Metallic, AO, Detail, and Roughness/Smoothness maps into one image for the HDRP Lit Shader. Put the script anywhere in your project. To open the window, just go to the top of Unity click Tools>Mask Map Packer.

Features:

• Packs grayscale textures into the appropriate channels for the HDRP Lit Shader.
• Sliders for channels that do not have textures selected.
• Preview Image.
• Checkbox if the input Roughness map (will invert colors since Lit Shader uses Smoothness Map).
• Packs grayscale textures into the appropriate channels for the HDRP Lit Shader.

Limitations:

• Texture import settings must have sRGB unchecked (as I am not 100% sure how to convert sRGB to Linear via script).
• All texture Inputs must be the same dimensions.
• While it should support any size texture, it gets much slower with 2048x2048 and larger images 1024x1024 and below is very quick (~3 seconds).