Stacking multiple Alpha Planes I have a simple scene where I have simple planes and textures using the alpha channel of the PNG as transparency.



The way I created the files makes the Alpha channel 000 black and 255 pure white. Here is one texture if you want to examine it.





When I prepare a scene using cycles, it works fine.



I can add more planes this way.



But when I add a third one, the intersection of the planes begin to form a shadow.



Stacking 4 planes make the shadow obvious. It is rendered on the spot where the images are combined.



Here is the blend file without textures.

What settings can I change? I changed bounce samples... but this is not about bouncing...

Any tips?
Currently you have a maximum of 4 transparency bounces:



So after 4 transparent surfaces overlap you will get errors.

You need to increase the number of transparency bounces so that there are as many as transparent surfaces a ray has to go throuugh: