let roofMaterial = new StandardMaterial("roofMaterial");
roofMaterial.diffuseTexture = new Texture("src/assets/roof.jpg", scene);
roof.material = roofMaterial;
but the texture of the main body of the house is still there, no problem in the webgl environment
It won t be possible to help without a repro 
https://playground.babylonjs.com/#KBS9I5#71
switching to webgpu brings up
Ohhh it looks like jpg are not working in WebGPU, @Evgeni_Popov is it a known limitation ?
Possibly related, webgpu does not support rgb texture format:
I guess a fix would be to convert to png to get the alpha channel back 
It’s a problem with the file itself, see my answer here:
You are the best !!!
