Sinespace is using Unity as its engine, so to upload items, you will first need to install Unity. We list the most recent and recommended versions of Unity on our Wiki. To download a version of Unity which is not the most recent on their website, go to their Archive page and download the version which is listed on our wiki.
When Unity is fully installed, you can then download our SDK/Editor Pack. See the full guide to downloading and installing Unity here.
Our SDK contains hundreds of ready-made components to help you upload content to Sinespace. You will need this installed on Unity before you can upload an item.
You can download the SDK from the Unity Asset Store here. You will need to sign into your Unity account before you can download the SDK. You can see a full guide on how to download and install the SDK on our wiki.
To upload items, you will need to add the Virtual Good component to them to sell them in-world. If you are uploading a region, you will need to add the Scene Settings to it to upload. Home templates need the Room Floor component to make them an editable home region. We have comprehensive tutorials for uploading different items on our wiki. You can find a tutorial for how to upload items via the Virtual Good component here
When you have submitted your content through the Virtual Good component, it will start the upload process to the Sinespace servers. You can check the progress of the upload on Curator. You can connect with other creators and our staff on Discord if you need any help or just want to show your WIPs. Please see our Terms of Service for more details on what you can/cannot upload.