How to create a double-sided texture?

When I create a polygon, the texture is single-sided and transparent from the other side. What is the reason? How do I create a double-sided material?

@LIRA0306

Could you please share sample file and complete code snippet that you are using? We will test the scenario in our environment and address it accordingly.

hey @LIRA0306, I recently had the same problem and found a way to “fix” it (I don’t know if there is a better way):

When creating the polygon, I did not just add the indices 1,2,3 but also 3,2,1
This both sides had texture on it

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@Hue404

Thanks for sharing the information that has been helpful for you. It could definitely help others having similar issues. In any case, problem keeps persisting, please do share a sample file and code snippet for our reference so that we can perform further investigation.