Why My Textures became worse under forward render

I change the RenderMode to Forward and Choose the anti-aliasing to MSAA in order to Use HTC Vive scene.
Howerer Many noise growing with my textures and dazzle my eyes.
how can i deal with this problem??

Its nearly impossible to be able to solve this without seeing a material setup. is there any chance you can provide us with one, so that we can see what any errors could be?