![Common 3D printing problems: holes and bumps on the top surface (pillowing). | by Ira3D Team | Medium Common 3D printing problems: holes and bumps on the top surface (pillowing). | by Ira3D Team | Medium](https://miro.medium.com/max/1000/1*T40PxCz2EwJ5N5dHsXhiBQ.jpeg)
Common 3D printing problems: holes and bumps on the top surface (pillowing). | by Ira3D Team | Medium
Soft Pillow Sleep Abstract Print Realistic 3d Transparent Background Icon Template Mockup Design Vector Illustration Stock Illustration - Download Image Now - iStock
![I have holes / pillowing on top layers with petg... looks like flow issue even though it's calibrated : r/3Dprinting I have holes / pillowing on top layers with petg... looks like flow issue even though it's calibrated : r/3Dprinting](https://preview.redd.it/34euj3n1n4u51.jpg?auto=webp&s=facf38252a2e5463dd916759a7e449723fd8080a)
I have holes / pillowing on top layers with petg... looks like flow issue even though it's calibrated : r/3Dprinting
![Any idea what causes this pilling and mess on the first layer? – Assembly and first prints troubleshooting – Prusa3D Forum Any idea what causes this pilling and mess on the first layer? – Assembly and first prints troubleshooting – Prusa3D Forum](https://forum.prusa3d.com/wp-content/uploads/2020/03/Final-underside.jpg)
Any idea what causes this pilling and mess on the first layer? – Assembly and first prints troubleshooting – Prusa3D Forum
![Any idea what causes this pilling and mess on the first layer? – Assembly and first prints troubleshooting – Prusa3D Forum Any idea what causes this pilling and mess on the first layer? – Assembly and first prints troubleshooting – Prusa3D Forum](https://forum.prusa3d.com/wp-content/uploads/2020/03/Layer-3-Print.jpg)