topic Re: strange edges visible in normal map UDIM in Maya Forum

strange edges visible in normal map UDIM

nkim39 — Wed, 23 Mar 2022 23:03:20 GMT

Hi, I connected textures to my character and I found that there are clearly visible edges on his cloth. It looks like someone traced all edges and polygons of my retopology modeling. I attached the screenshot of substance painter, and you can see that I did not mean those sharp lines. I googled it and tried everything but I still don't know what is going on. When I baked textures in substance painter, I put my z-brush high-resolution modeling as a high definition meshes. If anybody knows the solution, please help me!Texture what I made in Substance painterUV-normal mapUV-base colorMaya arnold render view

Re: strange edges visible in normal map UDIM

Christoph_Schaedl — Thu, 24 Mar 2022 02:20:16 GMT

I assume your normalmap isnt loaded in raw colorspace.

Re: strange edges visible in normal map UDIM

nkim39 — Thu, 24 Mar 2022 03:10:15 GMT

I chose Raw for its' color space but it still does not work. 😞 But thank you for your reply!

Re: strange edges visible in normal map UDIM

Christoph_Schaedl — Thu, 24 Mar 2022 03:27:11 GMT

Next try is to flip the green or the red channel.

You could also try to detach the cloth for a test. Just select the faces of the first uvtile and delete the rest. Create a new shader without uvtile. Now we see if the problem is coming from the tiles.

Re: strange edges visible in normal map UDIM

nkim39 — Fri, 25 Mar 2022 00:15:34 GMT

Hi, I finally succeeded to fix the problem. I exported higher resolution mesh from Z-brush and the lines disappeared. My character had only 35,000 polygons and I think that is the reason he got those strange lines. I thought that I do not need to export high resolution for texturing because I will bake mash maps with high resolution mesh that has about 2 million polygons. Thank you for your replies!

Re: strange edges visible in normal map UDIM

Christoph_Schaedl — Fri, 25 Mar 2022 01:54:36 GMT

Are you using the lowres mesh straight from zbrush in substance? If yes thats a bad idea.

Bring it first to maya and do clean hard soft edges based on your uv borders or set it up for mikkt normalmaps.

Re: strange edges visible in normal map UDIM

nkim39 — Fri, 25 Mar 2022 03:57:11 GMT

Oh I didn't know that! Thank you for your advise.

Re: strange edges visible in normal map UDIM

patel.dhvani — Sat, 10 Sep 2022 13:48:44 GMT

Hello, I am facing the same problem. After I exported the model from Zbrush, I brought it to Maya and did the retopo, and then textured the low poly model(the retopo model) in substance painter. I baked the high poly model(original model from ZBrush) on the low poly model in substance painter itself. and then when I checked the textures in Maya I saw those edges showing through the textures. Can you please explain how you solved it?

Re: strange edges visible in normal map UDIM

Christoph_Schaedl — Sat, 10 Sep 2022 13:55:41 GMT

Are you sure there are no hard edges in maya? Without the scene i can't help.