thatopen-impl-viewer

A blank ThatOpen viewer canvas usually means the setup order is wrong. You must initialize the scene, bind the renderer to a non-zero container, set the camera, and call components.init() last to start the render loop reliably.

To set up post-processing in a ThatOpen viewer, initialize the PostproductionRenderer and configure grid exclusion to avoid visual artifacts. This prevents grid-related rendering glitches while enabling advanced post-processing effects.

Yes, explicit container dimensions are required for ThatOpen viewer initialization. Binding a SimpleRenderer to a zero-sized DOM container causes rendering failures, so validating container sizing and DOM presence ensures the WebGL viewer starts correctly.

The correct ThatOpen lifecycle order is creating the World, assigning a SimpleScene, binding a SimpleRenderer, setting an OrthoPerspectiveCamera, and finally calling components.init() to start the deterministic render loop.

To fix grid artifacts in a ThatOpen post-processing viewer, use the PostproductionRenderer configuration to exclude the grid. This removes visual artifacts while maintaining the rest of your BIM scene rendering.

Yes, an OrthoPerspectiveCamera is supported and recommended for ThatOpen viewers. Assigning it correctly within the World setup sequence before calling components.init() ensures proper camera controls and responsive resizing.