MeshRenderer: Draw transparent black to picking layer to avoid wrong texture index for other layers   inviwo/inviwo-dev#879
MeshRenderer: Draw transparent black to picking layer to avoid wrong texture index for other layers   inviwo/inviwo-dev#879


Sparkier/inviwo,inviwo/inviwo,Sparkier/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo,inviwo/inviwo,Sparkier/inviwo,Sparkier/inviwo,Sparkier/inviwo