Vertex blending not working with bump maps

[grodenglaive]

The diffuse maps works as expected, but the shader just ignores vertexColor (and inverseVertexColor) for the bump maps and they still get applied across the whole model.

For example: in this material, the grass bump appears everywhere so my dirt path has a grass bump pattern visible in it, which does not look good.

textures/darkmod/map_specific/grass4_dirt_01_blend
{
	qer_editorimage textures/darkmod/nature/grass/grass4_ed
	surftype15
	description "grass"

	{
		blend diffusemap
		map textures/darkmod/nature/grass/grass4
		vertexColor
	}
	{
		blend bumpmap
		map textures/darkmod/nature/grass/grass4_local
		vertexColor
	}
	{
		blend diffusemap
		map textures/darkmod/nature/dirt/dry_earth_muddy
		inverseVertexColor
	}
	{
		blend bumpmap
		map textures/darkmod/nature/dirt/dry_earth_muddy_local
		inverseVertexColor
	}
}

I've tried other textures with the same result. Note that this shader was made using the built in material editor in DR 3.8.

[grodenglaive]

On 7/28/2023 at 4:12 PM, grodenglaive said:

 

here's an example with grass and cobblestones with vertex blending. Seems like a bug to me.