Alicia Fortes Machado

Alicia/internship half

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Adding blog post in Deep RL Libraries.

[XLand] Change predicates functions to be python objects

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So far, we are using defined functions as predicates [here](https://github.com/huggingface/simenv/blob/main/environments/xland/src/xland/game/generation.py#L15) for xland task generation. In the future, we could use python objects instead, so that an user can define a...

[XLand] Between a ramp and a wall, it seems like the structured grid is not being rendered.

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The bug can be reproduced with any of the scripts of XLand. You can see that in the following image, on the side of some ramps, instead of gray terrain,...

When creating a material with alpha smaller than one, it stays opaque. There was the same issue with Pyvista, but I fixed on my PR (adding `opacity` parameter).