Please excuse me guys,I am new to Houdini and I was trying to generate few passes of Pyro in Houdini but unfortunately I was unable to achieve those,I hope you guys would help me in resolving the following issues I have faced. I have enclosed my project as well as rendered .exr files for your consideration.

1)How can I generate motion vector pass by using Raytrace Engine in Houdini 14 Build 14.0.291 ?
2) I have generated few passes in houdini please check .exr file but I am unable to see fire and smoke mask in nuke though these masks are visible in Houdini Image Viewer.Please also explain how can I comp them together especially motion vector?
3) Can you explain me should I render Pyro using raytrace engine or PBR,I find raytrace engine fast and more efficient than PBR ,please correct me what I am doing wrong or how can I speed up my PBR rendering without compromising the quality?
4) Is there a way I can add displacement to my Pyro ?
5) How I can generate Volume Light Pass ?
6) How I can generate RGB pass ?


Thanks in anticipation.