To my knowledge, no mip features are working with render targets right now. There are settings called “auto generate mips” that don’t seem to work. I haven’t been able to get the “generate static texture” to work with non power of 2 textures, even with disabling all mip settings in the RT settings. I haven’t looked at the code to see why but its probably just an old assumption that mips are needed or something like that.
You may want mips for speed, for example the more you tile a texture, it can cause it to have poor memory coherence without mips. But you can usually size your render target appropriately to avoid that .