How to create a transition between two HDR enviroments?

[zedzara]

I hope this wasn't asked before.

basically I have a character who is in the middle for the scene.
during the scene, the scenery changes (objects swaping, materials transitioning), and I would like to change the environment also with it (because of the light it emits).

I know I can keyframe the specific hdr file, but that gives a to sharp change. it acts like a switch.
the best would be to find a solution, where I can kind of blend the 2 together, and finally leave my #2 environment ON.

thanks for helping in advance!

[aoktar]

Mix it with mix texture + two hdrs under environment tag.

[zedzara]

thanks aoktar! mix texture didn't come in mind.
appreciate your help!