Normal Maps Seams Are Visible

[Evyatar Barok]

Hey guys!

I'm trying to export a normal map to 3d coat from blender.

The Weird thing is that it worked yesterday, but now I get weird visible seams...

this is the normal map:

This is what I do in 3D coat (that worked correctly yesterday):

And this is the result:

Weirdly enough if I change the normal map's layer color blending option from "Normal map" to "Standard Blend" it looks like this:

If anyone has a solution to my problem it would be greatly appreciated, as currently I'm pretty much lost...

thank you guys in advance! :)

[Carlosan]

Hello

This node on Blender.

If result is correct, so Green Y channel its flipped at export.

Hope it help

[poeboi]

Hello!

From experience looking at pics of model here are some things that might be going wrong

When you are in paint room, with smooth shade display mode on (the default, hotkey 5) and only have normal map—
if the model is not an entirely "light gray" all over but also have these inadvertent dark gray spots, it could mean 

1. it is trying to display some faces the wrong normal direction, e.g. slightly inward even though it should be pointing outward, etc.
it might stem from the model's file itself, the problem can come from .mtl file accompanying a .obj file or normal information in fbx
2. normal map preset is somehow wrong, wrong red/green direction, 
3. the areas that are supposed to be "zero/no depth" do not have the color R/G/B 128/128/255 but sligthly darker!!
(you can check by just color picking a part of your normal map where there is supposed to be "nothing" and see if you get that color)

Seams like that in normal map might mean 
1. that the normal map are very exactly within or "on" the boundaries of each UV island, in example one for the head, cowl, horn etc →
if the edges are then slightly jagged, it will appear as seams because it can be offset slightly by some pixelation
this type of problem is less noticeable with higher resolution normal maps
2. UVs has somehow been smoothed one iteration but normal map is from unsmoothed model with unsmoothed UVs
3. In the normal map colour information, the contrast in depth information between what is situated exactly on the edge of UV island and outside is too great, causing a slight bump → and seam becomes much more visible

Here's some things you could try to either troubleshoot or solve it
1) Export model as .obj only without any materials, delete accompanying .mtl, re-import model into painting with default values. Verify that you get clean, 'light gray' model with no dark patches. Then at least, you know the problem is not 'baked into the model' so to speak
2) compare the UVs of model, how they appear for the model in 3dcoat and in blender before export of map, do they look different at all? You might have smoothed UVs without being aware of it when importing model into paint room. Making sure they're the same might fix the problem
3) check that there are no areas of normal map that is supposed to be "zero depth", color R/G/B 128/128/255, but is instead a darker depth value
4) Try WITHOUT any software preset on normal import, no preset
and try with one at a time, the various, Invert Red, Invert Green, Swap Red <-> Green settings and observe that you get correct normal display

Hope any of it can help
Also reminds me of 

 

[Evyatar Barok]

Thanks for the input guys... I tried alot of variations including no material obj and different invert green/red combination but it didn;t work...
Anyhow! I got it to work by just importing the normal map as a color/albedo map and setting the blending options to Normal Map  
it's weird cause it didn't work before but now it's working lol 

thank you guys for the help!