Why my model is like this? is there something to do with java itself?

[dull raptor]

When I did a reload after putting the model in the blueprints folder it said on the console several times a warning about the rotation of some blocks, does that has something to do with my problem? Beacuse the textures are fine, everything is in place, just the model itself looks like a smashed potato ):

[wanton karma]

Welcome to the help forum!

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[forest jungle]

!faq java-rotation

[wanton karma]

FAQ

Java: Rotation

The rotation of elements in the Minecraft Block/Item format are limited to one axis at a time and increments of 22.5 degrees. Minecraft cannot load models with different rotations.
(To be more specific, the only allowed values are -45, -22.5, 0, 22.5 and 45. If you work in a Block/Item format project and rotate an element then Blockbench will adjust the size/rotation/position of your element so you won't hit a wall at -45 or 45 degrees)

[dull raptor]

So I will have to re-make the entery project only using these rotation values?

[forest jungle]

For cubes, yes.
The groups can have whatever rotations you want.

[dull raptor]

is there a way to limit the rotation of cubes to be like java requires but in generic model? So I can work with it without needing to manually rotate the values on 22.5, 45, …?

[forest jungle]

I don't think there is a setting for that.
There might be a custom model format for the server plugin you are using though (like a plugin you can download/link from their website or something like that to add into Blockbench)