Deformation while editing uvs

HeatSeeking HandGrenade

So, ive been working on my uv editing and unwrapping. Ive never been able to get the hang of it and as i suspected i was missing a vital mundane step. Welding. But when i flatten uvs, i start to weld edges, the uv start to deform. Even if i put the edges parralell each other i still gat deformations. Naturally texturing is easier when everythin is propirtionate and correct to shape. Is there a way to prevent this or perhaps another vital mundane step ive overlooked?

Shogun3d

Ensure you "Preserve UV's". What program are you using?

HeatSeeking HandGrenade

3ds max just urwrap editor. Ive actually tried to find the preserve uvs function before.

MoP

It's a checkbox in the Modify panel when you're in the Unwrap UVW modifier.

HeatSeeking HandGrenade

Thanks man