# FAQ

Common questions and answers:

### Is the AI feature free?

AI mode is currently in testing and is free to use during the test period.Plans for the official release will be announced separately.

### Does AI mode need an internet connection?

Yes. AI generation runs in the cloud, so stay connected and signed in to your D5 account while using it.

### What should I do if AI generation is queued or fails?

  1. During peak hours, generation tasks may be queued. Wait a moment rather than submitting again.

  2. If generation fails, retry directly in the current interface. If it keeps failing, or the service is completely unavailable, contact online support.

### Installation fails, or an error appears on launch

Try the following, in order:

  1. Uninstall any LiveSync plugin previously installed on your computer — a leftover old plugin can conflict with D5 Lite — then reinstall Lite.

  2. Confirm your computer meets the requirements: Windows 10 (20H2 or later), an NVIDIA RTX 20-series or newer GPU, and GPU driver 528.33 or later.

  3. If it still errors on launch, make sure D5 Lite is updated to the latest version.

### The interface feels sluggish during use

Try turning off Windows "Hardware-accelerated GPU scheduling": open Windows Settings → System → Display → Graphics → Advanced graphics settings, turn off "Hardware-accelerated GPU scheduling," then restart D5 Lite for the change to take effect.

### SketchUp closes unexpectedly when applying a material

Some newer SketchUp versions may close unexpectedly when applying a material. In SketchUp settings, switch the graphics engine to "Classic" and try again.

### Why is my emissive material completely black?

Emissive materials are not affected by ambient light; when the emission intensity is 0, the image appears black. Set the emission intensity above 0. If you want a normal, lit material, use the General template instead.

### The Lite interface shows in English

D5 Lite offers Chinese and English. When SketchUp is set to a language other than Simplified Chinese or English, Lite displays in English.

### Some settings didn't carry over after syncing to D5 Render

Data syncs one way, from Lite to D5 Render, and a few items are not inherited — for example, the effect settings of an HDRI environment and a material's overlay color. These need to be set again in D5 Render.

### D5 Lite crashes on launch with multiple GPUs

Some computers have multiple GPUs (e.g. a laptop with an integrated GPU and a dedicated GPU). D5 Lite may fail to select the correct dedicated GPU on launch, causing a crash. Try any of the following to force the dedicated NVIDIA GPU:

  * **Windows Graphics settings** : open Windows Settings → System → Display → Graphics, add your modeling software (SketchUp / Rhino / Revit), click "Options," select "High performance" (the dedicated GPU), save, and restart your modeling software.

  * **NVIDIA Control Panel** : open NVIDIA Control Panel → Manage 3D settings → Program Settings, select your modeling software, set "Preferred graphics processor" to "High-performance NVIDIA processor," apply, and restart your modeling software.

  * **Device Manager** : open Device Manager → Display adapters, disable all display devices other than the dedicated GPU (e.g. the integrated GPU), then restart your modeling software.