# Weird artifacts on models when using Material Instance(Fixed) **URL:** \ **Category:** Asset Creation\ **Tags:** rendering-artifact, unreal-engine, Rendering, Lighting\ **Created:** [September 3, 2023, 3:05pm UTC](https://forums.unrealengine.com/t/weird-artifacts-on-models-when-using-material-instance-fixed/1281749 "2023-09-03T15:05:28Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Magnus8120](https://d1ap1mz92jnks1.cloudfront.net/user_avatar/forums.unrealengine.com/magnus8120/32/746987_2.png) [@Magnus8120](https://forums.unrealengine.com/u/Magnus8120)\ **Post date:** [September 3, 2023, 3:05pm UTC](https://forums.unrealengine.com/t/weird-artifacts-on-models-when-using-material-instance-fixed/1281749/1 "2023-09-03T15:05:28Z")
I faced a weird problem where the model I download from SketchFab was having some texturing issue and did not respond as expected to lighting. ![Screenshot 2023-09-03 173356](https://d3kjluh73b9h9o.cloudfront.net/original/4X/8/0/6/806327ec82dcdbd953e3cc60d47fe2cf82952160.jpeg) Where the model should have looked something like this. ![Screenshot 2023-09-03 173435](https://d3kjluh73b9h9o.cloudfront.net/original/4X/b/e/c/becd433d88d228685a4b1f440ea025ca1cb0504d.jpeg) This was my Material Setup where I created a Master Material with Default Textures and used different instances for the parts of the model. ![Screenshot 2023-09-03 173543](https://d3kjluh73b9h9o.cloudfront.net/original/4X/3/1/d/31dd937b785aba61939f016d74aae233e3fdb669.png) ![Screenshot 2023-09-03 173606](https://d3kjluh73b9h9o.cloudfront.net/original/4X/0/3/7/037eeaf44538602dd4137f5a33a7e3f2c38b8fe1.png) **If you are facing the same or a similar issue please make sure you have changed this in the Material** ![Screenshot 2023-09-03 174142](https://d3kjluh73b9h9o.cloudfront.net/original/4X/7/f/b/7fb4aab60f6fedb49e73704918b60a116b9f3cd2.jpeg) This seems to fix a issue and hope it saves your time.