baked hi-to-low-res Smoothing Problem

# 1 22-01-2009 , 04:56 PM

Registered User
Join Date: Jan 2005

Location: vienna

Posts: 1,095

facts of the case:
I baked a hi to low res geometry with "TransferMaps", applied the map to low geo. everything looks fine. so far so good. after closing and opening the scene again. the NM looks somehow inverted, ugly. the problem doesn´t only afect maya. test export to 3dsmax shows a similar behavior of either geometry or NM.

things I allready tried:

-converting geo to subD and back to poly.
-detaching/combining a face from the geo.
-smoothing full soft/hard (each version baked in a single map)
-deleted blindNodes and history
-freeze transformation.

-all different variations of settings in the TransferMaps dialog
-inverted red and green channels in photoshop.
-exported as fbx/obj and imported again.
...?

software on different machines displaying the geometry/NM abnormally: maya, 3dsmax, quest3D

I know maya has a problem ever since displaying normalmaps correctly with high quality settings in viewport. (somehow inverting the green channel) but I´ve never seen this odd behavior in 3 different applications.

if anyone has an idea ->
don´t hesitate to let me know!

edit- resized the pic

everything starts and ends in the right place at the right time.

Last edited by Falott; 22-01-2009 at 04:59 PM.

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# 2 22-01-2009 , 05:00 PM

Registered User
Join Date: Jan 2005

Location: vienna

Posts: 1,095

highRes over lowRes on the left.
lowRes on the right side.

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everything starts and ends in the right place at the right time.

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# 3 22-01-2009 , 06:19 PM

Maniacal boy king of Babylon
Join Date: Aug 2005

Location: the netherlands

Posts: 1,605

Are the normals pointing outwards, or maybe just a couple of them, i also found the transfermaps a buggy thing.
I know you have to fidle some withenvelope aswell

And displacement rendering takes just as long as when you had the highress model

My website;
https://www.eyellem.com

LinkedIn:
https://www.linkedin.com/pub/martin-van-stein/42/a81/b82

Yoda post;
https://forum.simplymaya.com/showthre...highlight=yoda

Indiana Jones Post;
https://srv01.simply3dworld.com/showt...threadid=29188

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# 4 22-01-2009 , 06:40 PM

Registered User
Join Date: Jan 2005

Location: vienna

Posts: 1,095

normals point outwards.

I´ve been playing with this shape and textures now all day long. what I can tell is

maya bakes NM with inverted greenChannel in allmost all cases, but sometimes not. I don´t know why. I use lefthanded tangentSpace.

shaderFX plugin from 3dsmax displays the obj with NM different from mayas way to display. maya has much smoother results in the panelview than 3dsmax with shaderFX-HLSL shader.

but

once you save a maya file and open it again the same normalmap´s green channel gets inverted somewhere in mayas shader. odd behavior. I had to smooth the whole obj again with 180° (same condition when baking the NM) then it showed up correctly in the viewer.

if I used a wrong NM with green inverted, maya shows it correctly like you´d expect. once you touch the obj with smoothing, the NM inverts instantly and gets displayed wrong - like it should.

all 3 applications interpreted the NormalMap different (from slight to very strong differences)

well after all I could not tell what the problem really is. but I get it working in quest3D that´s all what matters. would have been cool though to understand why maya ****s around with normalmaps all the time.

everything starts and ends in the right place at the right time.

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baked hi-to-low-res Smoothing Problem

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