Hello everybody!
After migration to 2.3.3 i got problem with my shader effect.
In editor v2.2.2 my shader looks like this:
In web shader looks like this:
In editor v2.3.3 shader looks as in editor v2.2.2
But in web i got just black screen
My shader code:
void main () {
vec3 col = smoothstep(0.7, 0.1, distance(vec2(0.5), v_uv0)) * vec3(0.0, 0.3, 0.45);
gl_FragColor = vec4(col, 0.25);
}
Hey @Zakhar did you solve it?
If not I’ll save your life 
I spend 4 hours to run a simple shader code correctly and found this before a lost my mind 
add this line to a component in the scene. Dynamic atlas messes up uv coordinates
cc.dynamicAtlasManager.enabled = false;
Hope it helps 
or another option is set packable option to false of the texture of sprite frame of sprite onLoad like this:
this.Sprite = this.node.getComponent(cc.Sprite);
this.Sprite_Frame = this.Sprite.spriteFrame;
this.Sprite_Frame._texture.packable = false;
Hope it helps also 
Thank you for the answer! It works 
But i have new problem 
I am trying to declare array uniform in my shader. My uniform looks like:
uniform arrays { float test[256]; };
And i get this error from cocos compiler:
error EFX2203: uniform float test[256]: array UBO members need to be 16 bytes aligned to avoid implicit padding
What does it mean?
And one more situation:
for this uniform declaration compiler has no errors
uniform arrays { vec4 explosions[256]; };
But if i try to get property information from my material in log, i see this:
Float32Array [0, 0, 0, 0] (4)
Why is there 4 elements in log? My uniform array declared as 256 vec4