Quote - ... and in your render settings set the shading rate to 0.00 or 0.02 at the most.

Just a quick note about this. 

If the Render MSR (minimum shading rate) value is lower than the object's or actor's MSR (set in its Properties), the latter value is used.

The default object/actor MSR is 0.2. I use a Python script to change it selectively in a scene, but apart from that I have never seen it set to any other value for anything I've ever used. So a Render MSR less than 0.2 is usually meaningless.

For better textures in draft renders, just switch off texture filtering. (You can set this state in the cr2). For final renders, reduce the Render MSR to 0.2.

Izi

"If I were a shadow, I know I wouldn't like to be half of what I should be."
Mr Otsuka, the old black tomcat in Kafka on the Shore (Haruki Murakami)