New voxel texture mode "Hair", for displaying the internal hair volume

structure as a texture.

This is mostly a debugging feature that may be removed again later.

release/scripts/startup/bl_ui/properties_texture.py

@@ -771,6 +771,8 @@ class TEXTURE_PT_voxeldata(TextureButtonsPanel, Panel):
         elif vd.file_format == 'SMOKE':
             layout.prop(vd, "domain_object")
             layout.prop(vd, "smoke_data_type")
+        elif vd.file_format == 'HAIR':
+            layout.prop(vd, "domain_object")
         elif vd.file_format == 'IMAGE_SEQUENCE':
             layout.template_ID(tex, "image", open="image.open")
             layout.template_image(tex, "image", tex.image_user, compact=True)