[Home](./index.md) > [@three3d/volume](./volume.md) > [SphereFogMaterial](./volume.spherefogmaterial.md) > [isSphereFogMaterial](./volume.spherefogmaterial.isspherefogmaterial.md) ## SphereFogMaterial.isSphereFogMaterial property **Signature:** ```typescript readonly isSphereFogMaterial = true; ```