Because it appears that exporting maps made in Valve Hammer to TC, trough Blender, doesn't work as intended, I must use TC. Because I'm new to TC, logically I have questions to ask. I will edit this post when I have more questions.
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Is there a way to unify the grid size? Currently it changes depending on the zoom level. It's horrible, I want one grid size that will stay that size regardless of the zoom, but it should be changeable of course. Like in Hammer