what can replace RGFloat format rendertexture on mobile

Hi all,because i want to use render texture store vector2 float,but some mobile not support RGFloat Rendertexture,What can i do ?

 

any help?

 

It's possible to use an ARGB32 and store a 16 bit float across two 8 bit channels. I think there's some similar example code for this in UnityCG.cginc, but it's for storing a single 32 float in all 4 channels. Otherwise you can find it here on Aras's blog:
http://aras-p.info/blog/2009/07/30/encoding-floats-to-rgba-the-final/

You do loose some precision, and you can only do a positive value between 0 and 1 so you have to adjust whatever numbers you want to store to fit in that range, but you will get something float-like.