Orthographics camera issue: placements in real time.

i created a group of 3D objects and I’m moving them in real time.
I positioned them so that there is not even thin line gap between them.
but, when I enter play mode, this is showing some line gaps.

I’m using Ortho camera. Please let me know if there is a setting correction for this.

Attached is the example!

Have you used vertex snap to place your objects?

this does not work for my case. I need to place objects of different size one on another to have my level playful. Please see attachment.

Sorry, Thanks for this idea. I found a work around based on this.
Great help!