Custom Render Texture Stuck at Half-Precision in-game only.

I'm in Unity 2018.4.20f1 I have a CRT configured as a 128x64 ARGB texture. It has as fragment shader which only uses floats and outputs a float of 100000.0.

I then read that texel in on a surface, and it reads back 65504, but only when in-game, or "playing." In editor mode, it returns a nice solid 100000.0.

I've tried several methods of reading the pixel's data, including Texture2D<float> with .Load, regular tex2D and .Sample.

All three methods behave the same.
...

Code (CSharp):

1. Texture2D<float4> _AudioLinkTexture;
2. #define GetAudioPixelData( pxcoord ) _AudioLinkTexture.Load( int3( pxcoord, 0 ) )
3.  

...

Code (CSharp):

1. sampler2D_float  _AudioLinkTexture;
2. #define GetAudioPixelData( pxcoord ) return tex2Dlod( _AudioLinkTexture, float4( pxcoord*_AudioLinkTexture_TexelSize.xy, 0 ,0) );

...

Code (CSharp):

1. UNITY_DECLARE_TEX2D_NOSAMPLER(_AudioLinkTexture);
2. SamplerState sampler_AudioLinkTexture;        
3. #define UNITY_SAMPLE_TEX2D_LOD_SAMPLER(tex,samplertex,coord) tex.SampleLevel(sampler##samplertex,(coord).xy,(coord).w)
4. #define GetAudioPixelData( pxcoord ) UNITY_SAMPLE_TEX2D_LOD_SAMPLER( _AudioLinkTexture, _AudioLinkTexture ,  float4( pxcoord*_AudioLinkTexture_TexelSize.xy, 0 ,0) )

...
What else can I try?

EDIT: This is on Windows, with an RTX 2070 GPU. So I have NO IDEA why it's truncating to half.

 

It appears as though the issue was the texture was being put through a camera renderer, which was punning the data to half. Will post again if I find an actual solution. For normal application this step must be performed.