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It can be made to work WITH Iray, it just doesn't work directly IN Iray... yet (see the notes in various places upthread about "it's being worked on".
The wolf test pic I did directly above your original post is exactly that; what I did was load one of the wolf presets, apply one of the supplied poses, then go into the LaMH plugin and convert the three hair groups into Fiberhair props. Once I had that, I could invisiblise the original hair groups and convert all the materials from 3Delight to Iray. Set Environment light, hit the render button, and wait for it to cook.
The one big drawback with this method is the hair is no longer a poseable object fitted to the figure, that re-poses itself as you change the figure's pose. I'm looking forward to the "works in Iray" update, but for now I can work around that. It's just a bit on the fiddly side.
It also creates a lot more points along the way where things might crash. I usually make sure to have a copy with nothing, a copy with LAMH, and then an Iray-ready copy with the fiberhair. This ensures that if anything gets corrupted along the way, I can go back to the original and reapply presets.
I've successfully rendered two animals with LAMH in Iray. Once you get the surface settings right, they look great. AM has some tutorials on using LAMH in Iray on his Youtube channel. I think this one is the latest. I highly recommend you watch it as there are some good tips in it. It can definitely be done in Iray, it just might need some tweaking.
I notice you have the same problem I had with a white specking on the fur of the animal. Attached is a copy of Alessandro's advice on how to fix it.
Cheers,
Alex.
I have just started messing with LAMH and noticed this, so how do you go about subsequent posing? ie how do you get rid of the obj unposable version (once that render/scne is done) and revert back to the standard LAMH so you can set up poses for another scene?
Or is that not possible and I should save the scene before doing the obj export and then save that scene separately once the obj export is complete?
Oh, I know why there's speckling — as I said, it was a test run and I only let the render run for 20 minutes. It was still very speckly after 5-10 minutes, so I think maybe another half hour or so would have cleared up most of it.
LAMH works with Iray. You can use the LAMH FiberHair Export (preferred) or the OBJ export.
Kendall
It's surprisingly simple — the converted fiberhair prop gets parented to the original figure (if you remembered to tick that box when converting), so all you need to do is delete the props, leave the LaMH hair groups alone, make them visible again, and go through the same sequence of re-pose, convert hair to fibermesh, convert fibermesh materials to Iray, and render.
If the hair preset is not adversely affected by the new pose, you can just pose it as normal. If, however, problems (overlap, etc) occur, follow the steps that SpottedKitty laid out.
Kendall
I just have to double, triple underline the officialness Kendall Sears pointed out -- USE FIBERHAIR.
I was doing a regular obj export and it was terrible. Took forever, made massive files I couldn't safely save.
Now that brings up an interesting point. I said I've experimented with Fiberhair conversions; I've never tried saving one. How does it compare with an .obj export? Is the file size really that much more, or is there a difference in the way the two of them render?
It's the actual mesh complexity and thus file size that will change. So a straight .OBJ fill always be larger of a FiberHair generated .OBJ (I'd say that in best case you will be able to squeeze up to 40-45%).
I don't know hard numbers, but when I converted to OBJ the files were a gig+, while most of the fur and normal stuff I did as fiberhair was only a dozen MB or something. I was astonished.
Depending on the preset, LAMH Fiberhair can get upwards of 70% size advantage over OBJ output. The more hairs in the preset, the more dramatic the size difference. And this is at the default 5% setting. Going higher can make the differential larger, but at a cost of (possibly) more "kinks" in the hairs. We say 40% simply as a baseline. Even with the compression setting set to 0 or 1 there will be a size differential with the FiberHair on the smaller side.
Kendall
So i've been playing with is a little.The fiber hair export is very useful.
I've run into some issues i wonder if you guys can help me with.
When styling hair with the comb the hair sometimes goes under the skin surface when I try and comb it around a the scalp. Is there anyway to prevent this? the morph tools can only do so much.
The program is very unintuative its very difficult learn. Any useful video tutorials about on you tube. I've seen the wolf one and some others but wondering if there's a better vid tutorial about?
Rending times.... Rendering seems to be taking a long time.... about 10x longer than an equivilent scene. Is this normal or do I need to adjust some settings?
thanks
ATM, there is no way to stop the guides from going into the mesh. You can mitigate this to a degree by using the "lock" feature and only selecting the guides that you want to manipulate. The "lock" sets the untouched control points to a variable resistance to movement. For instance, if you turn the locking totally on and comb/brush the half of the hair toward the tip, the half toward the root will (try) to stay where they are as much as is possible dependant on the magnitude of the changes to the end. Selecting only the "guides of interest" keeps incidental/accidental manipulations from occuring. You can also change the strength of the manipulations on the tool (the bar around the circle) as well as the size of the area affected (the size of the circle). Setting these appropriately for the task can help immensely.
There are many tutorials on http://www.furrythings.com
Once you output to OBJ or LAMH Fiberhair the rendering time is dependent on the amount of geometry that is dumped into DS. There's nothing we can do about that. For quicker "preview" renders use 3Delight and things will be faster as the Renderman Hairs render significantly faster.
Kendall
Would be a good idea to create a collision with the hairs to the surfaces they are being applied to with perhaps an option to sink them in just enough so it's a bit more realistic.
Maybe it's my imagination, but LAMH seems to be a bit more stable in 4.9. If true... yay!
In some ways, yes. And in others, no.
Kendall
I'm sorry if this is actually in the manual (but I think it isn't), but I can't find my LAMH tab anywhere in DAZ Studio 4.8, although it's listed under installed plugins. The figures load fine with fur though.
Anyone an idea where it could be hiding?
Its one of the panes you can select from the daz windows/panes dropdown. Once open you can of course dock it to your workspace, its not put there by default.
Thanks. I thought I checked the windows/panes, but maybe I missed it. Anyway, found it now, seems to be working fine.
Okay, this may be a really obvious question, but where do you put the preset files so that LAMH player can use them?
The LAMH presets can go anywhere you want. The default place is in the User's "Documents/DAZ3D/Studio/lookatmyhairAM/presets" folder.
Kendall
I was looking at a body hair product in another site and then thought... hey, wait a minute, I bet LAMH can do the 'covering of fine hairs all over your body' pretty well... and sure enough, yes:
http://willbear.deviantart.com/art/Woman-and-body-hair-591021917
200k hairs, everything except eyes/eyelashes/nostrils, made it very short and spherized a few times to get it laying mostly flat. Used Human Hair, 80/30 hair size, and Platinum color pattern.
Ok, that's funny.
A file with two figures that have LAMH. File size, 10 MB.
After converting to fibermesh? 300 KB. And they look great.
... so, huh.
Sounds like you deleted the LAMH Node before you saved with the FiberHair. This is fine, but will not allow you to regenerate the guides on next load. If you are using an already saved preset, this is OK. If you are using a custom preset, then there will be no record of it on load. Also, the fiberhair will not be able to adjust to morphs the same as the LAMH preset would if you decide to change things after save.
Kendall
Indeed. There is a lot of information stored in the .duf if the preset is left there.
Kendall
Here's a pro tip for using Mec4D's Iray hair shaders (Unshaven 2) with LAMH:
Ctrl-apply the Snow White shader (preserve texture maps). Put the diffuse map in the translucency, too.
Change the diffuse color to Value 220, the translucency color to Value 255.
This brings over the fur/hair coloration really well.
Examples:
http://willbear.deviantart.com/art/Bot-woman-and-squirrel-591699664
http://willbear.deviantart.com/art/Dragon-and-fox-591574063
http://willbear.deviantart.com/art/Wolves-in-a-dungeon-591488339