Maya 2018 - Displacement makes mesh fat, why?

#1

I cant make my displacement maps to work right in Maya 2018,

I applied my displacement map to this figue, and under shape, selected Arnold, Height up to 1 but it didn´t worked, so i raised up to 12 and displacement is been aplied correctly BUT…the mesh looks fat (inflated), i belive Arnold reads the gray in a weird way or something else is not working, so it makes the whole figure to look bigger, pushing like every single button i made it work once… i think the problem is subdivision catclark type or iteractions, but… now i dont know what i did an hour ago to fix it and imported a new figure wich is also imploding with displacements…so i took the last configurations and it´s not working even with same configs (filter type none, pre filter radius 2, under shape subdivision to none, iteractions to 0, auto bump off, height 12) with those attributes it worked with one figure perfectly, but it doesn´t with the other figure, i dont understand this problem, it feels like a bug.

What can i do?

#2

have you set the dispmap to “raw” color space in the fiele node.?

#3

It is very hard to say something without seeing an example or haveing a part of the mesh which has problems. It depends on the renderer, the type of displayment (normal, vector), the type of image you use, the scene size etc. So much possibilities.

#4

I already tried raw as color space for my file, it actually looks better in gamma 1.8 Rec 709, less inflated… but i dont think this is the problem, it has to be a miss configuration from myself or a bug in Maya.

#5

I finally discovered that this is ANOTHER bug in Maya 2018, this is how it happens:

In the Arnold shape i turned subdivision type from Cat Clark to NONE and then i raise the height to 12, after this the mesh gets imploded, the problem isn´t the height, the problen is in arnolds subdivision type, to solve this you lower the height to 1 again and start switching type from cat clark to none (several times) until mesh looks ok, it usually happens with none, then when the mesh looks good you raise height and then you change to cat clark and it fixes the inflation, at least it worked this time in Arnold RENDER VIEW… but

NOW!!! another problem,I see displacement in render view, it looks awesome and no inflated mesh… BUT, when i finally click RENDER…OMG Inflated mesh again… how render view and finall render can show different resoults… hell Arnold!

OMG why bump is so EASY just drag and drop file and Displacement its so horrible.

#6

Find your displacement node attached to your shader, there should be an Arnold drop down in it. Adjust your Scalar Zero Value to 0.500, it should push out and in now.
Hope it helps

#7

Would be really interesting to have an example file because I never had such problems with displacement mapping.

#8

Bloops - a picture is worth a thousand words. Show us what’s happening and we can help you much better.

#9

Thats what makes it implode, i scale up to 12 to make displacement higher, there is actually no other option for displament raise… and “displacement” appears in yellow so i canot adjust that value, but Arnold has tons of useless displacement options all over the place in mesh shape…horrible, increasing height makes the entire mesh to get bigger but at least i see the displacemnt over my fat mesh LOL, if i lower it to an scale of 1, it looks as designed, but displacement is almos none existant, i have to be super close to notice it, so this is my problem, if i make it higher than 1 it implodes the mesh, if i make it lower it doesn´t show the displacement.

After it implodes, first i start Render view to see the displacement better, then i go to groupshade/ arnold/ subdivision: clat clark on and iteractions up to 4; then in displacement attributes I click to auto bump (and i only do this because every body do this in the tutorials OMG ahahaha but i see no changes befoe and after), so…it does nothing but if then i lower height to 1, and turn subdivision to none and iteractions to 0 and start switching between none and cat clark and i finally see my mesh looking fine in Arnold “render view”, i can even raise height up to 12, and displacement looks awesome and strong without affecting the shape of the mesh, but if i click “render” inflated mesh again, thats why i dont understand why render view shows me my displacements perfectly and render doesn´t, and i also dont understand why switching between catclark and none fixes my inflated mesh in render view, it clearly feels like another bug in Maya 2018.

I already did everything, i also tried to remake my displacements in zbrush many times with different options enable, this should be an easy proces, zbrush doesn´t even have so many options, Maya 2018 has tons of options for a simple thing,so weird why Autodesk made bump so easy as a file drag and drop but displacement it´s so complicated with Arnold, i remember it was very easy with Mental ray, i didnt even had to do anything in shape, just add the file and adjust the displacement with 1 or 2 options…

But thanks dude! Sorry i cannot upload models or pics of this job, as i always do, i thing i already reported like 30 real bugs for Maya 2018… i never had so many bugs with any other version, it makes me sad…because i have to stop working for days when this things hapen, maybe Maya´s code is dated already, well i dont know, i just want to fix this problem and Autodesk never answers, im still waiting to solve a problem from Maya 2014 LOL.

#10

Well, you cannot not even post a small part of the geometry with a part of the displacement map? This seems really to be a problem, but I cannot completely follow your description. It would be helpful for all of us if we can nail down this problem.

#11

@haggi
Don’t waste your time, this guy is a joke.
Most of the time he simply doesn’t know how to use Arnold and barely maya.
Every time he hits a difficulty he starts whining all over the place and yelling bugs bugs bugs.
To give you an idea of the mindset, for him when Arnold is using 100% of the cpu it’s a bug because his computer is heating.
This guy created a whole thread about how evil Arnold wanted to burn his house, and how bad is Arnold for utilizing all the resources of your comp.:banghead:

#12

Obviously Arnold is not going to burn my house LOL… Just an “small mind” could ever belive that, that was a joke about a real problem i still have with Arnold wich is overheating of my laptp with simple renders, and i did use Mental Ray before without having this problem, so i know what i´m talking about, i dont need to be an expert to feel how my laptop gets overheated just when i start to render with Arnold for Maya and i also proved it by posting my heat readings wich went over 92° during rendering with Arnold; I dont see any bad thing about reporting bugs or problems, thats exactly the kind of Fedback Autodesk needs from customers, thats why so many bugs went without fixing until many years before and Feedback is what makes a company Strong, understanding the needs of your custmers, you like it or not and perhaps there is something that we can do ourselves to temporaly fix this issues, there is nothing wrong about helping each other, this forum is not for experts, experts don´t need a forum to solve problems , i totally disagreee when i see people making simple questions and suddenly someone replys with rude coments, i see this every time.

Thanks Mr Haggi,

Back to our serious conversation, well i actually quit from trying to make displacements to work, its just another Maya 2018 bug so i cant fix this problem, it might be fixed in Maya 2022 LOL, so in order to continue my work i decided to use Normal maps, they work perfectly, the bump option in Arnold is super easy for bump or normals, but displacement didn´t at least in my personal case.

#13

That’s exactly what we try to find out. If it is really a bug, it would be great to approve it simply to know about it we use it next time. That’s how it happens often in the houdini odforce forum. Very helpful.

#14

I love that part “so i know what i’m talking about”, so ridiculous. Do yourself a favor and go learn some basics stuff about how things are working for god sake.
I will try to explain again, Arnold rendering is a cpu intensive task. Arnold can use your CPU at full speed and all the cores. When the CPU is at full speed it will heat especially if you are on a laptop.

My god how on earth i have to explain such rudimentary things!
And you still arguing that Arnold has a bug because your computer is heating! Man you can’t imagine how stupid you sentence is.

If you have questions just ask, but stop whining and yelling BUGS BUGS BUGS everywhere about things you clearly don’t understand.

#15

OMG attacking users as usual, not helping, so disrespectfull and as always you have nothing to say, i´ll just ignore your comments… since they never bring anything new to the table, like right now.

Guys, sorry this conversation became another Onouris joke…

#16

Thanks man, sorry i cannot upload my scene by contract, maybe i´ll try to replicate this problem in a new scene

#17

That’s the actual issue here, Bloops. We all work under various contracts, that’s nothing new here. Your NDA has nothing to do with your question or this thread or this forum. It’s your presentation - or rather complete lack of any presentation - that is unhelpful, for us to actually help you. You put up your own roadblocks then get upset when other people stumble upon them trying to help you.

You should have replicated this problem already in a new scene before even coming to CGTalk looking for help. You’re just wasting everyone’s time here, asking us to guess what’s going wrong instead of posting a simple screenshot or anything illustrative. Your attitude stinks and I suggest you consider that constructively, and be a bit more humble and forthcoming in the future here. Nobody’s going to want to help you if you’re just going to be a jerk about it.

#18

All i can say it´s thanks, i belive this is another bug in Maya 2018 and we cannot solve it, so i moved on.

Since Bump is way better and works perfect, i´ll try not to use displacements in Arnold again, it starts to feel to me, like if i say that something is great in Maya (wich i have said many times) no one recognizes it “cero replys” cero controversy, people just ignores nice coments, but if i say something is not working right, people (same bullies of always) start attacking me for saying the true or exposing problems or potential bugs in Maya replying that i´m just a noob or that i´m lying or immature, now… i´m not humble…OMG! if i can i always attach images when asked since the one requiring urgent help is me, you can check, some of my post even include a “image attached” in subject, even do its soo hard in this forum with maximun file sizes, this time i cannot post and i said it.

About the “jerk” thing, i belive i´m enough humble not to refer that way to others.

#19

That’s sad because in general displacement works really good in Arnold. We used it really often and you can get screen based tesselation what saves a lot of data. So your case seems to be one of the rare cases where it does not work.

#20

Yeah, actually it´s really sad, i dedicated so many time to this subject, i tried to make it work, but people is almost insulting me now; but if in the future i replicate this i´ll share, i think i´m going to wait for Maya 2019, maybe it also focuses on bug fixing and this problem goes away LOL… right now i just need to move on with my work, i have auto impossed time limits ahaha and i need to continue making meshes and rigs, and weights wich also are time consuming.