How can i eliminate the gradient,, make it smoothly?

as you see,my model and background image display some gradient layer by layer,
this is not what I want,
how can i eliminate the gradient,
make all smoothly?


this will help to reduce banding, not sure if you can get rid of it completey

THREE.ColorManagement.legacyMode = false

gl.outputEncoding = THREE.sRGBEncoding
gl.toneMapping = THREE.ACESFilmicToneMapping

if you use buffers or postpro, your webglrendertargets should also be sRGBEncoding and type: THREE.HalfFloatType

EffectComposer.js - > type: THREE.FloatType

BTW: Using half float for internal render targets should be sufficient.