Block like surface when painting bump map So I painted bump map started with grey color with rgb values .5, and I painted with not full black color and I decreased strength to ~.15 when I took a look of what object look with bump map, it was ugly as I have low resolution image I tried all sizes for 1k to 4k and they give me same results, I tried saving as 16 bit it gave same results, tried plugging it in displacement input still no difference, how to overcome/fix this so it becomes smooth, and yes node is set to non color data.

p.s. on images strength of bump map is decreased to ~.2
When you generate a new bump texture image, be sure to tick the option 'Float Buffer' so that you use 32 bit instead of 8 bit or 16 bit image depth.