I currently have this model:

// Date: 2/12/2014 10:01:52 PM
// Template version 1.1
// Java generated by Techne
// Keep in mind that you still need to fill in some blanks
// - ZeuX
package tlhpoe.fs.entity.model;

import net.minecraft.client.model.ModelBoat;
import net.minecraft.client.model.ModelRenderer;
import net.minecraft.entity.Entity;

public class ModelMKM7 extends ModelBoat {
//fields
ModelRenderer leg1;
ModelRenderer leg2;
ModelRenderer body1;
ModelRenderer body2;
ModelRenderer head;
ModelRenderer cannon;

public ModelMKM7() {
	textureWidth = 64;
	textureHeight = 32;
	leg1 = new ModelRenderer(this, 0, 0);
	leg1.addBox(0F, 0F, 0F, 2, 3, ;
	leg1.setRotationPoint(5F, 21F, 4F);
	leg1.setTextureSize(64, 32);
	leg1.mirror = true;
	setRotation(leg1, 0F, 3.141593F, 0F);
	leg2 = new ModelRenderer(this, 0, 0);
	leg2.addBox(0F, 0F, 0F, 2, 3, ;
	leg2.setRotationPoint(-5F, 21F, -4F);
	leg2.setTextureSize(64, 32);
	leg2.mirror = true;
	setRotation(leg2, 0F, 0F, 0F);
	body1 = new ModelRenderer(this, 20, 0);
	body1.addBox(0F, 0F, 0F, 6, 2, 6);
	body1.setRotationPoint(-3F, 21.3F, -3F);
	body1.setTextureSize(64, 32);
	body1.mirror = true;
	setRotation(body1, 0F, 0F, 0F);
	body2 = new ModelRenderer(this, 0, 11);
	body2.addBox(0F, 0F, 0F, 4, 5, 4);
	body2.setRotationPoint(-2F, 16.3F, -2F);
	body2.setTextureSize(64, 32);
	body2.mirror = true;
	setRotation(body2, 0F, 0F, 0F);
	head = new ModelRenderer(this, 44, 23);
	head.addBox(0F, 0F, 0F, 5, 4, 5);
	head.setRotationPoint(-2.5F, 12.3F, -2.5F);
	head.setTextureSize(64, 32);
	head.mirror = true;
	setRotation(head, 0F, 0F, 0F);
	cannon = new ModelRenderer(this, 0, 20);
	cannon.addBox(0F, 0F, 0F, 2, 2, 1);
	cannon.setRotationPoint(-1F, 13.3F, -3F);
	cannon.setTextureSize(64, 32);
	cannon.mirror = true;
	setRotation(cannon, 0F, 0F, 0F);
}

public void render(Entity entity, float f, float f1, float f2, float f3, float f4, float f5) {
	super.render(entity, f, f1, f2, f3, f4, f5);
	setRotationAngles(f, f1, f2, f3, f4, f5, entity);
	leg1.render(f5);
	leg2.render(f5);
	body1.render(f5);
	body2.render(f5);
	head.render(f5);
	cannon.render(f5);
}

private void setRotation(ModelRenderer model, float x, float y, float z) {
	model.rotateAngleX = x;
	model.rotateAngleY = y;
	model.rotateAngleZ = z;
}

public void setRotationAngles(float f, float f1, float f2, float f3, float f4, float f5, Entity e) {
	super.setRotationAngles(f, f1, f2, f3, f4, f5, e);
}
}

 

That takes a texture with a size of 64 by 32. The problem is, I have a texture with a size of 128 by 64.

 

If I try using the texture, this happens:

 

Am I doing something wrong?

Change

textureWidth = 64;
	textureHeight = 32;

to

textureWidth = 128;
	textureHeight = 64;

?

This happens:

 

 

If I tried changing the

.setTextureSize(64, 32);

 

to

.setTextureSize(128, 64);

 

This happens:

 

 

Additionally, if I double the texture locations:

new ModelRenderer(this, 20, 0);

 

To this:

new ModelRenderer(this, 40, 0);

 

This happens:

The way i did it, was go in Techne and made my model twice as large, made a texture twice as large and then in your renderer use GL11.glScalef(0.5f,0.5f,0.5f). This is a very time-consuming way because you need to remake your model, make your textures twice as large and export it again etc.

You might have to remap the texture coords on your model, to get it right, or use larsgerrits way.