Channels Tab

This tab is used when an additional image, other than a standard rendering, is required. This is mostly used when you intend to do post-processing using an external image editing program.

Available channels are: Color (standard rendering), Normal, Depth, Alpha, Object ID, Material ID, and channels specific to Adaptive (BSD) rendering mode (Direct, Ambient Occlusion, Global Illumination, Subsurface Scattering, Reflection, Refraction, Transparency, and Irradiance). Some channels like Shadow Channel, Raw Diffuse Color, Raw Diffuse Lighting, Raw Diffuse GI, Self Luminance, and Pass per Light are only available for Presto engines.

When 'Pass per Light' is enabled, independent images will be produced for all available light sources. This can consume a lot of memory when there are many lights and the resolution is high.

Mask passes will only appear when you assign a mask to a group, component, or image using the Thea context menu.

Active Channel: Displays the selected channel in the Rendering Panel. After a rendering has been completed, every enabled channel is displayed in this list.


This is the built-in denoiser of Thea Render. You must enable the Denoise Channel in order to see the denoised image and use the strength and Details parameters.
Strength: Controls how much the denoising filter will affect the final image.
Details: Controls how much of the original detail of the image will be kept in the final rendering. Higher values will try to keep as much detail as possible.

Depth Channel Range

Min/Max Z (m): Controls the minimum and maximum distance along the camera's z-axis.

Photometric Analysis

Luminance analysis describes the luminance and illuminance distribution. Thea Render can compute both. Luminance is computed out of the box for any image that you have already rendered and for any render settings. Illuminance can be computed by the Adaptive BSD engine. To view the analysis of a rendered image, select ‘Photometric’ from the drop‐down menu. Min/Max Il-Lum: These values represent the range of the Luminance (cd/m2). By changing these values, the false color image is updated accordingly.