$texture2 bumpblendfactor

$texture2_bumpblendfactor, $texture3_bumpblendfactor, & $texture4_bumpblendfactor allow you to control how much the $bumpmap shows for a given layer in Lightmapped_4WayBlend materials.

Note:If the material has a $bumpmap2 defined, then $texture2_bumpblendfactor is ignored. Instead the bumpmaps blend the same as they would in WorldVertexTransition.