Did you prime the ceiling before painting? With new texture, applies to all new drywall or plaster, the surface needs to be primed well with an acrylic primer, allowed to dry completely, then painted with a good paint.

At this point you should do the following;

1. Sand the ceiling: Use a fine grit sandpaper to smooth out any imperfections on the ceiling surface, including roller lines and squares from the beams.

2. Prime the ceiling: Apply a high-quality primer to the ceiling before painting to create a uniform surface and improve paint adhesion.

3. Choose the right tools: Opt for a high-quality roller cover (lamb’s wool) with a nap suitable for the texture of the ceiling. Consider using a thicker nap roller cover, such as a 1/2 inch nap, to help cover imperfections more effectively.

4. Use the correct paint: Ensure you are using a paint specifically formulated for ceilings. Flat latex paint is suitable for ceilings as it minimizes glare and hides imperfections.

5. Apply the paint in thin, even coats: Avoid overloading the roller with paint, which can lead to roller lines and uneven coverage. Apply the paint in overlapping strokes to create a seamless finish.

6. Work in sections: Divide the ceiling into manageable sections and complete one section at a time to maintain a consistent wet edge for a smooth finish.

7. Allow for proper drying time: Follow the manufacturer’s instructions for drying times between coats to prevent issues like roller lines and uneven coverage.