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Pro: Best Way to Correct Knees & Elbow Folds on Raster Images

Posted: Sat Aug 19, 2023 1:30 pm
by RendCycle
Hi! I'm new to Moho and using Raster Images in animation. What is the best way to correct animation of knees and elbow folds on Moho Pro 12? Please refer to the image below for more info.

Image

Re: Pro: Best Way to Correct Knees & Elbow Folds on Raster Images

Posted: Sat Aug 19, 2023 5:50 pm
by synthsin75
Bone>Create smooth joint for bone pairs

Victor has an awesome tutorial for using it more than once on the same limb: https://www.lostmarble.com/forum/viewto ... =9&t=27158

Re: Pro: Best Way to Correct Knees & Elbow Folds on Raster Images

Posted: Sat Aug 19, 2023 6:22 pm
by Greenlaw
Yes, try Smooth Joint first. It's the easiest thing to try and if it works, that's great! Smooth Joint is what I used for the Puss In Boots elbows and in other early Moho TV work. It can work well for certain textures, however, you might see issues with very detailed textures, like between your character's sleeve and forearm. Definitely give it a try though.

If it doesn't work as desired, I suggest creating a custom mesh and using a Smart Bone in the joint to correct the deformations. When set up properly, the rotation of the joint will deform the mesh exactly the way you want. Tip: it helps to divide the mesh at the joint so you can overlap elements in the drawing, like the sleeve over the arm. This also helps when you need to change the stacking order, like when the character reaches behind himself.

Re: Pro: Best Way to Correct Knees & Elbow Folds on Raster Images

Posted: Sun Aug 20, 2023 4:02 am
by RendCycle
synthsin75 wrote: Sat Aug 19, 2023 5:50 pm Bone>Create smooth joint for bone pairs

Victor has an awesome tutorial for using it more than once on the same limb: https://www.lostmarble.com/forum/viewto ... =9&t=27158
Excellent tip! I will try this out. Thank you very much! :-)

Re: Pro: Best Way to Correct Knees & Elbow Folds on Raster Images

Posted: Sun Aug 20, 2023 4:09 am
by RendCycle
Greenlaw wrote: Sat Aug 19, 2023 6:22 pm Yes, try Smooth Joint first. It's the easiest thing to try and if it works, that's great! Smooth Joint is what I used for the Puss In Boots elbows and in other early Moho TV work. It can work well for certain textures, however, you might see issues with very detailed textures, like between your character's sleeve and forearm. Definitely give it a try though.

If it doesn't work as desired, I suggest creating a custom mesh and using a Smart Bone in the joint to correct the deformations. When set up properly, the rotation of the joint will deform the mesh exactly the way you want. Tip: it helps to divide the mesh at the joint so you can overlap elements in the drawing, like the sleeve over the arm. This also helps when you need to change the stacking order, like when the character reaches behind himself.
I was wondering about the sleeve as well. I will try out your suggestions too for using Mesh + Smart Bone on the Joint part. Thank you! :-)

Re: Pro: Best Way to Correct Knees & Elbow Folds on Raster Images

Posted: Sun Aug 20, 2023 4:55 am
by RendCycle
I've tried using Smart Joint based on the video tutorial. But I can't seem to use it because the option is disabled for me even in Pro. Are there other steps I need to do to make it work? Kindly refer to image below:

Image

Re: Pro: Best Way to Correct Knees & Elbow Folds on Raster Images

Posted: Sun Aug 20, 2023 5:02 am
by synthsin75
From the user manual:
This command works on a pair of selected bones (for example, bones for the upper
and lower arms, or upper and lower legs). The two bones also have to have a
parent-child relationship, and start out in close to a straight line.

Re: Pro: Best Way to Correct Knees & Elbow Folds on Raster Images

Posted: Sun Aug 20, 2023 5:41 am
by RendCycle
synthsin75 wrote: Sun Aug 20, 2023 5:02 am From the user manual:
This command works on a pair of selected bones (for example, bones for the upper
and lower arms, or upper and lower legs). The two bones also have to have a
parent-child relationship, and start out in close to a straight line.
I adjusted the bones, aligned them more straightly, and the Smart Joint option activated! I was then able to further make adjustments to the placement of those 'Bones with Smart Joint' using Transform Bone. Resulting effect of each bone when rotated is ok but I will probably still have to make those Arm images straighter to have a much better looking bend. Thanks once again! :-)