The initial proposal is below. This issue is a place to discuss

8. Disallow texture*() of a texture_depth_2d_array with an offset

Justification: OpenGL ES does not support textureOffset() on a sampler2DArrayShadow.

Alternatives considered:

• emulate with a texture() call and use ALU for offset
  • pros:
    • compatibility, performance
  • cons:
    • untried