What is correct loss drop please？

[silmont2000]

My laptop performance is poor， so I use ‘-layers 12’ and ‘ -sublayers 2’
But the output image is all white，And my loss did not drop significantly
so What is correct loss drop result， please

[pureexe]

Try to reduce the learning rate.

For example, add the parameter -lr 5e-4
if loss still don't go down, try -lr 1e-4