How to make environment reflections?

im trying to make reflections as shown in this post, but when I do this, i see reflections but with skybox too, why? can anyone show how is it done? it is futuree lighting tho

Just to confirm, have you followed the instructions for enabling it:

Enable it via Studio beta features and make sure that you set Lighting.EnvironmentDiffuseScale and/or Lighting.EnvironmentSpecularScale to 1.

i did, THEN the skybox and the reflection appeared. i also have set ambient to black