Wooden Structure/Water
I started building the platform and stairs of the tree house by modeling a piece of wood in Zbrush and then piecing together the wooden structures by copying and changing the basic length and width.
At the same time, I noticed a lot of black spots on the texture of the tree trunk. So I rearranged the UV image of the trunk. It worked better than before.

I added a small river and pond because the current environment was a little monotonous. I first created the topography of the river channel and then placed the water plane on it.

Then I built a wooden bridge in the same way I built a wooden platform before.

After the overall main structure was basically complete, I began to further adjust and enrich the details. I added more stones and flowers in the clearing and on both sides of the river, trying to make the river look more realistic. More trees were added to shape the environment of the forest. A fog was added to blur the distant trees. To enhance the contrast between near and far.

Decorations
Go into more detail. Some lights and decorations were made to make the house look more colorful. Added ropes for the bridge.





A different shape of lighting, I used it as lighting for the stairs.

All the modeling and decorating is done here. After the final lighting, weather, fog and overall tone adjustment finished some final render images.Each light and atmosphere tone may be slightly different because I want to convey the right ambience.
Rendered Image





Video Flythrough
This is a flythrough video. The three sections respectively want to show normal daylight, dark daylight (highlighting tree lights) and afternoon light.
Conclusion
Through this project, the knowledge I learned most intuitively is the application of new software.It gave me more insight into the process of making 3D games.The process of completing and advancing the project step by step made me understand a lot of new things.There are new skills and some obstacles.Each piece of software or their interplay is important, and there is a lot of room for expansion at each link.At the same time UV and normal is a very important link, it makes me feel the most complicated. And my model needs a lot of improvement in that area.And in this process, I understand that there are many ways to solve the problem, and the selection of suitable or best will affect the result, but at least it is not impossible to solve.I think I should try my best to choose the best way to complete the task in the next project. For example, I should set a higher standard for the ideal finished product, which may enable me to complete better works. Meanwhile, the existing problems should also be solved. I hope I can understand them more thoroughly in the next project, which may require more study and attempts.