Texture distortion after Blender export to MSFS

[FlynZSky]

I've started having an issue lately when exporting a model from Blender to MSFS that the textures will distort on part of the model. The UVs are arranged properly and aren't overlapping in any way. I also don't have the issue in Blender or Substance Painter or any other 3D model viewing software. It only seems to be once the model is imported to MSFS from Blender. I'm using Blender 3.3.3 and 1.3.1 of the Asobo exporter.

 

[hnau64]

Hi, I once had a similar problem (Blender to XPlane12)

In Blender, the scaling was not reset to 1 after the moddling transformation.

In Blender directly everything always looked good, but the XP had a problem with it.

Solution:

Blender Layout Mode

Object Making

CTRL + A

Rotation & Scale




Greetings from Hamburg
Heyno

 

[arno]

Indeed check your texure coordinates. MSFS does compress them in the BGL file and when the coordinates are not near the 0 to 1 range this leads to data loss and thus distortion in the mapping.

 

[FlynZSky]

Hi, I once had a similar problem (Blender to XPlane12)

In Blender, the scaling was not reset to 1 after the moddling transformation.

In Blender directly everything always looked good, but the XP had a problem with it.

Solution:

Blender Layout Mode

Object Making

CTRL + A

Rotation & Scale




Greetings from Hamburg
Heyno

Heyno, thanks!
So if I'm understanding correctly, that once I apply all transforms then I need to go behind it and apply rotation and scale and then run the export to MSFS? I still seem to be having issues after doing this.

 

[FlynZSky]

Indeed check your texure coordinates. MSFS does compress them in the BGL file and when the coordinates are not near the 0 to 1 range this leads to data loss and thus distortion in the mapping.

Arno-
All of these textures are tiled, so the UVs are outside the 0-1. How does this impact the issue? Do the UVs have to be brought back down into this space?

 

[hnau64]

I feed my models in Blender with the most different formats (bmp, jpeg, png ...) and the most different image sizes. Tiles are also not an unknown size for me - depending on the object. I scale tiles far beyond the image boundaries.

That shouldn’t be the cause of your problem - I think ...

For me, rotation and scale solved the problem

I’m curious what cause it will have with you in the end.

 

[arno]

How much are they tiled? If it's only 2 or 3 times it might still work, but not when done much more.

 

[FlynZSky]

How much are they tiled? If it's only 2 or 3 times it might still work, but not when done much more.

I usually do a 4K UV and then will double the texel density once I have the UV mapped. Sometimes I will tile multiple UV tiles depending on the mesh I’m mapping and then double all of them.

 

[arno]

I can't follow what you say. The UV mapping is independant of texture size. What causes the distortion is mainly how often you tile the texture on the model.

 

[FlynZSky]

I can't follow what you say. The UV mapping is independant of texture size. What causes the distortion is mainly how often you tile the texture on the model.

I think I see what you’re saying now. I think I misunderstood you to begin with. I was thinking along the lines of how many times I increased the texel density which would send the UV islands outside the 0-1 by a certain amount. What you’re saying is the number of times I scale the tiled material to repeat in Substance Painter can’t be more than 2-3 times.

 

[arno]

Correct, you can't repeat the same texture too many times. It also depends on if you repeat it exactly 2, 3 or 4 times of if you repeat it 3.486 times. In the last situation you will run into distortion quicker.