Common glows problems
 
 
 

This section covers glow problems in the render.

Shader glow

Problem: Shader glow brightness changes during an animation, or Shader glow brightness is different at different rendering resolutions

The shader glow auto exposure is adjusting the overall brightness of the scene for each frame. When a glowing object enters or exits the frame, the glow intensity of all objects changes.

The shader glow auto exposure causes a similar problem when rendering at different resolutions. For example, shader glow brightness is different in a high resolution final render than in a low-resolution test render.

Do one of the following:

See ShaderGlow in Render > Multi-lister.

Glow is missing from volume lights

Light from a volume light exists only within its volume. If the camera is not within this volume, then glow is not rendered.

Do one of the following:

Light shining through objects

Problem: Linear and area lights shine through objects, or Light glow shines through objects.

Linear and area lights do not attempt to detect if there are shadowing objects between the light and the eye. All other light types compute this occlusion factor.

See Hide Source in Render > Multi-lister.

The radius of the light may be so large that it is never completely occluded by the object that should be shadowing it.

See Light Radius in Render > Multi-lister.

Glows do not render

There is not enough memory for the renderer to calculate glows.

Do one of the following:

See Optimization.