Tweet
Hi Vlado,
We were going to use the vray atmosphere fog for a few shots where we wanted some mist drifting across a battle field so atmospheric fog would be perfect with a noise in the density channel. Daniel Rath in here set up a scene with an animated noise and it seemed to render horribly slowly. He chased it down to a bug where if you put a noise map in the density channel it's fine and renders quickly. If you put a key on any value of the noise map though it makes the render slow to a crawl. Initially I thought this was because of vray trying to do motion blur sampling on the volume and thus it'd increase sampling by the number of motion blur steps. He mentioned that he had motion blur off however and what's more, there was only a single key on the noise parameter for the entire scene, it wasn't actually animating. We tried the same thing with a smoke texture to see was it a bug with all procedurals but the animated smoke rendered fine.
I've attached a scene with three maps in the mat editor. Noise_no_ani which has no animation at all, Noise_ani which has a single key on a parameter but doesn't actually animate and then smoke_ani which does actually animate but renders fine in a normal frame time. Again no biggy since we can probably use bercon noise instead or just the smoke but just a heads up!
cheers,
John
We were going to use the vray atmosphere fog for a few shots where we wanted some mist drifting across a battle field so atmospheric fog would be perfect with a noise in the density channel. Daniel Rath in here set up a scene with an animated noise and it seemed to render horribly slowly. He chased it down to a bug where if you put a noise map in the density channel it's fine and renders quickly. If you put a key on any value of the noise map though it makes the render slow to a crawl. Initially I thought this was because of vray trying to do motion blur sampling on the volume and thus it'd increase sampling by the number of motion blur steps. He mentioned that he had motion blur off however and what's more, there was only a single key on the noise parameter for the entire scene, it wasn't actually animating. We tried the same thing with a smoke texture to see was it a bug with all procedurals but the animated smoke rendered fine.
I've attached a scene with three maps in the mat editor. Noise_no_ani which has no animation at all, Noise_ani which has a single key on a parameter but doesn't actually animate and then smoke_ani which does actually animate but renders fine in a normal frame time. Again no biggy since we can probably use bercon noise instead or just the smoke but just a heads up!
cheers,
John
Comment