Hello,
I have pressure issue with the version 10 : If I make a pillow or a bed comforter (two simple planes with correct normal orientation) and I put a value above 1, the simulation goes crazy as I would have put a value of 10... I need really strong gravity to counter that :/
I'm working in cm and importing my avatar (a simple bed geo) from 3ds max
I've tried to reinstall MD 10 several times with no luck...
I had no issues with previous version.
Thank you in advance !
Nothing to do with the MD install.
Each layer of cloth that has pressure applied for a quilted object MUST HAVE (< note how I stress that in caps) equal and OPPOSITE pressure applied. This balances out the inflation effect on each pattern piece. And in conjunction with this each pattern area must be equal. When pressure is applied it is a force that acts against the inside of the fabric pushing outward. So the normal orientation of the assembled fabric is CRUCIAL. When you have all these elements in balance you will get a >controlled< simulation. Get one or more of these factors out of balance and you will get an unequal simulation that will escalate into a a physical turbulance mess. Which is maybe what you are experiencing. So now is a time to check off each element in your build carefully.
It's also likely your build process is wrong (see order below) as well as the settings for quilted items within MD. So you really need to be methodical and run a check list process on a build until you get familiar with the process. It is highly likely you have missed a few key settings that balance out the build assembly.
Make sure your scale is correct > MD works at human scale > this means your bed sheet should be roughly human size at smallest or real world size at optimum for a bed sheet > set particle distance to 20mm for the initial simulation > then reduce to 10mm for a final simulation > a bed sheet has a lot of surface area so you need to be careful with how you run that simulation. You may cheat high frequency quilting pucker by applying a higher detailed normal map to a coarser mesh distance (eg: 20mm).
When you use pressure for a cloth item like a bed spread you must have an equal and opposite pressure force on the assembly for both mating patterns. And this also means you need to factor in the mesh normal as that could be pointing in the opposite direction if you cloned the bedspread one above the other.
The process to make an inflated (quilted) bedspread is to create the single pattern > simulate that into the assembly position at 20mm particle distance > and then clone (only) after you have placed in all your internal lines for sewing. This will create a direct layer clone in that drape position with all sewing in place. And before you simulate again > You need to set the normals correctly for the cloned pattern - otherwise the simulation will become chaotic. This means the darker face should be pointing inwards for both patterns when assembled. You may use the MD tool > flip normals for this. > select the pattern piece that needs the normals flipped in the 3D window view > right click and choose the flip normals option. Then you need to check all your sewing is correct and not also flipped > if it is correct this by redoing the outer sewing and flipping any seams where this has occurred. Use the 3D window assembly seam view to check this by switching on that view parameter. Now you should be ready to run your simulation of the cloned pattern piece. And note only run this simulation when you have performed these adjustments and checks.
Finally check your assembled (quilt) layer order and if needed assign the lower layer 0 and the upper layer 1, simulate with GPU and then refine with a CPU simulation (bets quality) and once it settles into the correct position switch both layers back to layer 0 (this is crucial).
Hope that helps > remember to check all normals, sewing, layers and finally use the CPU to run a final simulation.
You can check normals in your 3ds max to see if they were correct in the final assembly > if that was your problem it will show in the normal orientation view in Max.
Below Bed quilt fabric > using free texture software and a bit of know-how.
Multi-light fabric normal reconstruction using 12 images varying light angle (incoming). Under 10 seconds compute, all texture maps outputted to 16bit normal's and 48bit col.
댓글을 남기려면 로그인하세요.