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UV Unwarapping with seams

UV Unwarapping with seams

Michael-FarrellC88WE
Explorer Explorer
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Message 1 of 3

UV Unwarapping with seams

Michael-FarrellC88WE
Explorer
Explorer

I'm coming over from Blender and I'm having some trouble UV unwrapping in Max.

 

Here's how I do it in Blender. I mark my edges as seems (red), I hit unwrap and I'm left with the UV map you can see on the left.

Blender UV.jpg

 

 

I'm trying to replicate this in Max which should be pretty simple. I mark my edges as seems, one vertical, and I mark off the caps, I hit 'Quick Peel' and I'm left with this mess.

Max UVs.jpg

 

I don't know why the vertical shaft of the cylinder is split into two islands with only one seam and I don't know what is going on with the caps. This seems to be a problem I'm having at large where I end up with islands, or at least splits in islands, that don't correspond to my seems.

 

Any help would be greatly appreciated.

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977 Views
2 Replies
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Message 2 of 3

10DSpace
Advisor
Advisor

@Michael-FarrellC88WE 

 

First apply an Edit Poly modifier to the cylinder base object then apply the Unwrap UVW modifier and you get a better result. 

 

10DSpace_0-1652063031276.png

 

For some reason, trying to unwrap the Cylinder primitive base object produces the strange results that you have observed (for me as well) in Max 2022 (and probably previous versions as well.)  But with the Edit Poly applied, you don't even have to set seams if you follow the following workflow:

 

1. Make sure "Ignore Backfacing" is turned off in the "Select By"  section of the Unwrap UVW rollout.

2. Select all the polys in the cylindrical section (without either the top or the bottom polys ) and click on "Quick Peel" this will unfold and separate these polys but the resulting UV island may not be perfectly straight.  

10DSpace_1-1652063638675.png

 

To fix this, select all of these unwrapped polys and then Tools>Relax to make the UV island a straight rectangle.   If the top and bottom polys have been separated but are not perfectly cylindrical, then just select each one and use the Relax Tool on them to make them so.   

 

3. When these parts are all unwrapped, click on "Pack: Custom"  to pack all of the UV islands in the U1V1 tile.

 

If you are still having trouble post a screenshot and we can take it from there.

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Message 3 of 3

Michael-FarrellC88WE
Explorer
Explorer
Accepted solution

This is a problem I'm having in general, I just used a cylinder to illustrate what's happening. On my other mesh (not a primitive) I did have an edit poly mod and it was still happening but i found a solution either way.

 

I just happened to spot a "UVW Mapping Clear" mod in the mod drop down, I applied it before the unwrap UVW and problem solved! Everything now works as expected!

 

I'll take a swing at that other method you suggested, Thanks for the help!

 

 

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