That was when the U.S. and Russian spacecrafts first docked together, Besson tells EW with a gleeful smile.

We see that in the opening credits ofValerian.

For this shot, Besson says, I almost didnt change anything.

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Daniel Smith/STX

The large blue-silver bubbles are air locks filled with various atmospheric makeups for the different species.

They were all insane and I loved them, he says, laughing.

Besson also explains, I was seeing their progress with the concepts for a whole year.

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STX Entertainment

It was a long process but thats the only way to get true creativity.

So on Skype I was showing drawing of the others work to each guy.

Of Alpha, Mauro remarks, Theres nothing on Earth that looks like this.

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STX Entertainment

Its cohesive but all meshed together, and Luc always preferred the most fascinating and most cool.

And the most square footage.

Never contradict the boss whether he be director or president about his real estate claims.

Valerian and the City of a Thousand Planetsopens nationwide on July 21.

Check back here for many more details.