i am trying to get rid of these steps in my bump map. Someone told me these steps occur because 8 bit isnt enough because it only contains 256 colors. So I increased the bit depth to 32 and tried several noise removing and gaussian blur methods but these steppings are still there and I don't know how to smooth them out. Even setting the Texture interpolation to Cubic only removes some steppings but not all.
How do I get rid of these steppings?
This is my problem. This is when interpolation is set on Linear
And this is when interpolation is set on Cubic or Smart. Only a few steppings got smoothed out but not all.

