Maya 2020 fundamentals - modelling the real world
Get halfway through a model and find it's an unworkable mess? Can't add edge loops where you need them? Can't subdivide a mesh properly? If any of this sounds familiar check this course out.
#
1
06-03-2012
, 03:52 AM
Registered User
Join Date: Feb 2012
Join Date: Feb 2012
Posts: 17
Mirrored Mesh texturing off-colour
I duplicated and mirrored this object with -1 setting, keeping in tact UV settings etc.
From there, I "reversed normals" from polygon menu without altering anything else.
Then, I applied the same baked texture from the original onto the mirrored version;
but for some reason, it is appearing much darker than the original.
Any idea what is going on? Appreciate any help!
(In the photo, the right is original, the left is the flipped with 'reverse normals'
They both have the same texture applied.)
Last edited by foldedpaperbird; 06-03-2012 at 03:54 AM.
#
2
06-03-2012
, 07:33 AM
The thin red line
Join Date: Aug 2009
Join Date: Aug 2009
Location: England
Posts: 4,472
Avatar Challenge Winner 2010
#
3
06-03-2012
, 08:13 AM
Guest
Posts: n/a
@Dave - When you mirror and object at -1 scale it reverses the normals so they're all pointing inward, so they need to be flipped.
#
4
06-03-2012
, 09:29 AM
Subscriber
Join Date: Dec 2007
Join Date: Dec 2007
Location: NZ
Posts: 3,125
You'd normally scale in the negative, then freeze transforms then reverse the normals.
that's a "Ch" pronounced as a "K"
Computer skills I should have:
Objective C, C#, Java, MEL. Python, C++, XML, JavaScript, XSLT, HTML, SQL, CSS, FXScript, Clips, SOAR, ActionScript, OpenGL, DirectX
Maya, XSI, Photoshop, AfterEffects, Motion, Illustrator, Flash, Swift3D
#
5
06-03-2012
, 11:01 AM
Registered User
Join Date: Feb 2012
Join Date: Feb 2012
Posts: 17
Hi,Looks like Acid's right on this one. you duplicated and scaled in a negative direction but you probably didn't freeze the transforms (which you should after scaling it like that).
You'd normally scale in the negative, then freeze transforms then reverse the normals.
I did the following before exporting for game:
1. Select Mesh
2. Delete all by type> History
3. Freeze Transformers
4. Reset Transformers
5. Export
I also just tried it in the order you suggested and still getting a grey/off white model
#
6
06-03-2012
, 11:03 AM
Registered User
Join Date: Feb 2012
Join Date: Feb 2012
Posts: 17
Shader? hmm how would I find this out? I believe so.Is the mesh using the same shader? why did you flip norms? how did you create the duplicated part................dave
I know both the original and the duplicate were exported with a blinn material.
I will attach some more photos of the issue.
One is of a plain solid white texture on the models, the other is my baked texture.
#
7
06-03-2012
, 11:20 AM
Registered User
Join Date: Feb 2012
Join Date: Feb 2012
Posts: 17
When I bring the models into the game and use the local game lighting to "light" it up, they appear the same colour but ONLY when I use the lighting. Otherwise, they are still one dark and one light.
Someone is telling me it is like the lighting is inversed similar to how the model was inside out before i reversed normals. It makes sense, is this the issue? And if so, how would I go about resolving it?
I feel like I am overlooking something really silly (this is my first time mirroring/flipping after all)
Here is a photo of them lit-up inside of the game, the previous photos were in the game 'as is'
#
8
06-03-2012
, 11:42 AM
Guest
Posts: n/a
And of course you'll have to adapt parts of it to match the specific engine you're exporting forhttps://dl.dropbox.com/u/35400504/Mak...rt%20Guide.pdf
Last edited by Acid44; 06-03-2012 at 11:45 AM.
#
9
06-03-2012
, 12:00 PM
Registered User
Join Date: Feb 2012
Join Date: Feb 2012
Posts: 17
I asked around over on the game area too and got the same response.
Thing is, I froze transformers after reversing the normals. -1 causes inverted normals, right?
Reversing normals was the only way I could get my -1 mirror to not be inside out.
So essentially, it should be working fine once the transformers are frozen?
My steps are as follows
1. Ctrl+D to copy original
2. Scale to -1 for mirror image
3. Object Mode Select > Display > Normals > Reverse
4. Delete history, freeze, reset
5. Export as fbx
6. Use FBX converter to convert to dae
7. Load to game
@ Acid- Thanks, pretty anxious to read that but for some reason it won't open up for me.
Last edited by foldedpaperbird; 06-03-2012 at 12:36 PM.
#
10
06-03-2012
, 12:38 PM
Guest
Posts: n/a
#
11
06-03-2012
, 12:42 PM
Registered User
Join Date: Feb 2012
Join Date: Feb 2012
Posts: 17
ha, that worked! Thanks. I will read thisHmm, did you try saving it instead of opening in browser? It works fine for me :S
#
12
06-03-2012
, 01:22 PM
EduSciVis-er
Join Date: Dec 2005
Join Date: Dec 2005
Location: Toronto
Posts: 3,374
#
13
06-03-2012
, 02:02 PM
Moderator
Join Date: Jan 2004
Join Date: Jan 2004
Location: Michigan, USA
Posts: 2,998
You need to swap steps 3 and 4, you must freeze the transforms BEFORE you reverse the normals. It is the act of freezing the transforms that reverses the normals. You even get a warning message.
You can test it to see. Go to lighting and turn off 2-sided lighting. Then make something and duplicate and scale it -1. You will see the lighting does not change. Now freeze transform on the -1 scaled part. You will get a nastygram warning parts have become inverted and the -1 scaled part will turn black. Now its normals are truly inverted so now you can reverse the normals and finally delete the history.
the order should be
1. scale -1 to flip
2. freeze transforms (now the normals are inverted)
3. reverse the normals.
4. delete the history
You were flipping steps 2 and 3.
"If I have seen further it is by standing on the shoulders of giants." Sir Isaac Newton, 1675
Last edited by ctbram; 06-03-2012 at 02:18 PM.
#
14
07-03-2012
, 01:20 AM
Registered User
Join Date: Feb 2012
Join Date: Feb 2012
Posts: 17
Thank you,Stewrt is correct, you are should freeze transforms before reversing the normals.
You need to swap steps 3 and 4, you must freeze the transforms BEFORE you reverse the normals. It is the act of freezing the transforms that reverses the normals. You even get a warning message.
You can test it to see. Go to lighting and turn off 2-sided lighting. Then make something and duplicate and scale it -1. You will see the lighting does not change. Now freeze transform on the -1 scaled part. You will get a nastygram warning parts have become inverted and the -1 scaled part will turn black. Now its normals are truly inverted so now you can reverse the normals and finally delete the history.
the order should be
1. scale -1 to flip
2. freeze transforms (now the normals are inverted)
3. reverse the normals.
4. delete the history
You were flipping steps 2 and 3.
I followed your steps and did the test, and I did see it turn from black back to the normal lights.
Though when I upload to game, the model is still grey.
Im beginning to think something is wrong with my initial model (though the normals are pointing outwards on that one)
#
15
07-03-2012
, 01:36 AM
Registered User
Join Date: Feb 2012
Join Date: Feb 2012
Posts: 17
In the 'reverse normals" option settings, mine were set to "Reverse user normals"
but needed to be set to "Preserve user normals direction"
Now I am getting a nice clean pure white mesh.
Thank you to all for your help!
Posting Rules Forum Rules
Similar Threads
trouble opening maya scene
by jooleyinboots in forum Maya Technical Issues replies 3 on 07-10-2022
Texture the low OR hipoly mesh if doing normal bake?
by bpears in forum Maya Materials & Textures replies 2 on 05-04-2013
Colour is meaningless
by Chirone in forum Maya Basics & Newbie Lounge replies 9 on 21-09-2011
Mesh has an unwanted "second body"
by Tristanartform in forum Maya Technical Issues replies 7 on 26-10-2007
Texturing a polygonal mesh...
by synergy55 in forum Maya Materials & Textures replies 5 on 06-04-2003
Topics
New tutorial - Create tileable textures from photos. Photoshop to Alchemist to Maya 2
By David
Site News & Announcements
3
Free Courses
Full Courses
VFX News
How computer animation was used 30 years ago to make a Roger Rabbit short
On 2022-07-18 14:30:13
Sneak peek at Houdini 19.5
On 2022-07-18 14:17:59
VFX Breakdown The Man Who Fell To Earth
On 2022-07-15 13:14:36
Resident Evil - Teaser Trailer
On 2022-05-13 13:52:25
New cloud modeling nodes for Bifrost
On 2022-05-02 20:24:13
MPC Showreel 2022
On 2022-04-13 16:02:13