hl2_src-leak-2017/src/materialsystem/stdshaders/WorldVertexTransition.psh

; STATIC: "DETAIL" "0..1"
ps.1.1

tex t0 ; basetexture
tex t1 ; basetexture2
tex t2 ; lightmap
#if DETAIL
tex t3 ; detail
#endif

mov_sat r1.a, v0.a
lrp r0, r1.a, t1, t0

mul r0, r0, t2
#if DETAIL
mul_x2 r0.rgb, r0, t3
#endif
mul_x2 r0.rgb, c0, r0   ; * 2 * (overbrightFactor/2)