Displacement - another issue

[bleepurchin]

I've looked at his scene and he doesn't have the problem...
After bringing my mesh into his scene and looking at both his displacement settings and mine, there is no discernible difference.

I now think its something to do with sharp corners .... I just got a cube and put displacement on it and only when i made the cube filleted did the polygons stay together and the displacement function as it should....

It's all totally confusing and I now have a headache...

Is there anyone out there who has some input on this?

I've only been using displacement for one day and I came across this almost immediately.
So why is the forum not filled with reports of this problem!??


Luke.

[aoktar]

Can you see my sample? It's working much better with some good uv mapping. You should try to be away from hard edges.

[Yambo]

There is some issues with the displacement for no doubts, but there is also some workarounds:

1. If your UV׳s wrapping are good and your model normal angles or not too sharp the displacement will look just fine. For example check out this NAB 2015 - Steven Messing example at: 37:40 : http://www.cineversity.com/vidplaytut/n ... n_messing/
2. ALWAYS put an object tag on your displacement model, it helped me with some unwanted results.

As you said - You are only using displacement for one day, but you busy writing here instead of experimenting. Play with it a bit - try to understand it - and then feel free to post here your inputs. You indeed paid a lot for it but you had the chance to see exactly what you are buying. The demo is fully funcional and without any time limit.

Anyway i׳ll be happy to assist you with further displacement issues, just PM if the what i wrote above not work for you.

oh and, you can post a scene file here. Just zip it.

[bleepurchin]

Morning Aokta,

Thanks for sending the file. I see from it that you are having the same problem I am... yes its not as bad but it should not be there at all ...right? ...

[bleepurchin]

Thanks Yambo,

You have really helped me here. The object tag has certainly made the displacement better.... it has not removed the problem but it's made me see that maybe I can get around this somehow...

In the link you sent me he's using what is essentially a sphere... I can see how that would produce better results but I need jagged rock like structures... and very few smooth angled surfaces.

I've uploaded my file for you with the texture I've mapped onto it. I'd normally say that it is mapped as good as it can be but maybe you think its not? I know that my mesh isn't perfect but it has been made using a combination of a bevel deformer and a bulge. This was to save time - I have hundreds of these crystal like shapes in my scene and modeling them all perfectly was not an option.
(I've included the original object with its deformers so you can see how it was made.)

Dis_Iss_01a.zip

(4.5 MiB) Downloaded 102 times

Thanks for looking at this.

Luke.

[Yambo]

I׳ll check it out soon (approximately 5 hrs) and i׳ll write you back.

cheers.

[bleepurchin]

lol, I will try to wait

One other thing if you wouldn't mind telling me please - Is there a way to bake Octane noise to a texture file?

Thanks,
L.

[Yambo]

Dear bleepurchin,

Please find attached screenshot from your scene file optimized correctly.
As you can see Displacement is working properly after i did some quick retopology & unwrapped the UV's.

Your topology was far from being something to work with, and your UV's where just a random thing. (also your scene scale was huuuuge)
Displacement is working just fine when you know your limitations.

If you ask me? Start by learning unwrapping UV's
cheers.

[bleepurchin]

Oh cool...looks great!

However, I said before, I can not afford to make models for all of my scene as there are hundreds of these shards and to have the density of polygon you have here would be unworkable.

The mesh I had was workable if you don't intend to use textures with UVs. I was going to use procedural projections and not UV mapping. However, as Octane does not have the support in place yet for this I am forced to work into my models.

Some of us are motion graphic designers looking for short cuts - not CGI movie makers

[bleepurchin]

Ok so I've remodeled it and here it is. I've not made the mesh as dense as yrs as I figured I could use the object tag to smooth the mesh for me.

Am I right in thinking that I can unwrap this mesh now? I'd like a word or advise on that before I take it much further please.

Dis_Iss_02.rar

(190.91 KiB) Downloaded 93 times

Many thanks again!
Luke.