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I created this project to explore seasonal, day-night, and precipitation cycle changes in Unreal Engine. To explain my process, I want to give a run-down of  two of the key assets of this project: the level blueprint and Runtime grass.

This project was created with Unreal 4.25, Substance Painter, Substance Designer, and Maya 2019.

This project was inspired by Ferdinand Ladera's Manalink Market

The music in this video is Burst — Land of Fire

Before I explain my code too much, I need to show that much of my seasonal changes are done within my asset materials to keep from adding everything into my code for a simple change of color. I did this through the creation of a material collection parameter and many, many linear interpolations (lerps). This allows me to just switch a scalar parameter value to 0 or 1 and automatically change the season for every material I wish to edit. This technique was used for about 90% of my effects. If something isn't named within the level blueprint, it's changing via the material parameter collection.

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In my level blueprint, I called a few separate blueprints into it so that the level blueprint can access their custom events or variables.

To get a step-by-step explanation, click on the images below.

Finally, here is my event tick sequence in my level blueprint, which actually creates the seasonal, day-night, and precipitation cycles!

To get a step-by-step explanation, click on the images below.

I created a mood board for colors and lighting for each of my seasons, which I reference when changing colors and intensities.

For this project, I also explored spline blueprints and using construction scripts more for optimization! I used these for my fencing, snowmen, vines, and signage.

To get a step-by-step explanation, click on the images below.

Lastly, I'd like to explain my Runtime grass and terrain materials!

To get a step-by-step explanation, click on the images below.

As a last example for my seasonal changes, here is one shot with multiple states of daytime, seasons, and weather.

Thank you for looking over my process!