3ds VectorMap texture - blurry tiles

[cgrant3d]

Thought I'd try something new on this project and use the vector map texture to map hardscape details onto concrete. It's worked well except for one critical detail that pretty much ruins the effect. The Vector map gets progressively blurrier as it recedes into the distance at Z depth intervals (see pic). It makes the linework get really fat in the distance instead of getting thinner....

Quick search of the usual resources and I'm not finding a solution. Hoping maybe there's a maxscript flag for tile size, quality, etc that I don't know about. Any ideas?