Troubleshooting
Fixes for the most common problems.
| Problem | Solution |
|---|---|
| No effect visible | Check that the Post Process Volume has Infinite Extent (Unbound) enabled, or that the camera is inside the volume. Check that the material is added under Post Process Materials. |
| Effect only inside a rectangle / wrong colors | The master material's Blendable Location must be Before Tonemapping. |
| Noise or flicker in busy areas | Use TSR or TAA. Lower Sharpness (e.g. 5–6). Reduce FarRadius if the flicker is in the distance. |
| Depth Fade does nothing | Use_Kuwahara must be on. Check that FadeNear < FadeFar and that the values match your level scale (cm). Test with NearRadius = 0, FarRadius = 8. |
| Image too bright or dark with Paper | Your paper texture is not centered around mid-grey, or sRGB is on. Lower PaperStrength. |
| Effect looks wrong in the Material Editor preview | Normal. The preview sphere is not a real scene. Test in a level with a Post Process Volume. |
| "SceneTexture expressions cannot be used in opaque materials" inside a Material Function | Preview-only warning. Harmless. |
| UI is not affected | Expected. UMG widgets are drawn after post processing. |