Hey @kiranmaya , I’m really glad you’re linking the material lab!
From the screenshot it seems like your material is not a UI material?
The node GetUserInterfaceUV outputs the pixel size, which is then used to compensate the scaling of the UVs, so you can keep the same ratio regardless of the ratio of the object you’re rendering. But that node works only on UI materials, which is materials that are using the User Interface material domain, so for normal Surface materials, you won’t be able to keep the scale that way. Instead you’ll have to do it manually, so for example you can use the Scale function and adjust X and Y manually to achieve the ratio you want.
Hope that helps,
Irene