Sampling Texture3D with Bilinear/Trilinear SampleState is not respected on iOS

Title says all. I have a Texture3D and when I set filter mode in the inspector to Bilinear or Trilinear and sample from it on PC it looks fine. However, when I build for iOS and sample using tex3D() or using _Cache.Sample(Cache_Trilinear_Mirror_Sampler, ... it renders as if were sampling using point filtering.

Anybody know what's going on here?

Here is where I'm declaring the Texture3D:

Code (CSharp):

1. Texture3D texture3d = new Texture3D(width, height, frameCount, TextureFormat.RFloat, false)

Here is where I'm transfering the data over from a Texture2D:

Code (CSharp):

1. colors[x + y * width + i * width * height] = (byte)(255 * texture.GetPixel(x, y, 0).r);
2.  

Here is where I'm applying the data to the Texture3D:

Code (CSharp):

1. texture3d.SetPixelData<byte>(colors, 0);
2.  

PC


iOS


Thanks for any help.

(Update)
I worked it out, someone kindly on Discord pointed me to this PDF:
https://developer.apple.com/metal/Metal-Feature-Set-Tables.pdf
I switched my Texture3D format to R8 from RFloat and it started filtering correctly.