#materials

complex.shader has no shipped source and no evidence it reads vertex color as albedo, so don't plan per-vertex color painting through it. The reliable runtime color-per-surface lane is a baked texture plus Material.CreateCopy and Set("Color", tex).

A near-white chalky sky stays mid-grey or blue: fixing the sky texture alone isn't enough because the default tonemapping curve crushes highlights.

Per-instance Tint on a flat-color vmat (white PNG + g_vColorTint) rotates hue or crushes random instances to black: use scale/yaw jitter instead.