I have created a scene and the scene includes a Smoke Effect and UV wrap material and I have created the UV wrap material in Cycle render and the smoke effect in the blender render and then copy-pasted the two objects from separate blender window into the main scene window, now in the scene, when I am doing rendering in cycle render, the whole screen is appearing black and when I am doing rendering in blender render, the smoke effect is not working and the cube in which the smoke effects we generally see, is turning into the whole grey colour and the UV wrap material is also not showing its true colour, it is still appearing the same grey colour, what shud I do?