options

A morph that is made which minimises texture stretching - can be impossible to entirely reduce, but it can help

Smaller chest size to cause less distortion

Uvs which have no distortion from the start, which is not always true

'Texture stretch fix' morphs for extreme bends - I included some of these in a recent product to good effect. Difficult to make

Procedural textures aka shaders. downside is often a lack of sharp detail supplied by an imagemap

Mixed texturing - a painted detail map blended with a procedural fabric pattern. May be difficult to set up

This is always an issue, but as you can see there are a variety of ways to get around some of it.  If you have a large chested figure you use often, you can consider modifying existing garments to suit the figure better, by editing the uvs to fit the distorted shape or squishing the texture maps. For a single use this is a lot of work to put in.

Lyrra