Hi Aoktar - sorry for the problems but it is not so easy for me to translate it in english.
The plants plugin "Laubwerk" work in my c4d - you see it in the post above with the leafes in the tree.
And the problem is that the plant for e.g. the Tree "Field Maple" has 11 materials in one object but no selection tags - they are hidden like the tags in the sweepnurp dokument from the developer.
one sweepnurp with three materials but no selection tag because the sweepnurb has automatical the intern selction tags C1 and C2. in the octane render it only take the last material in the tags - the violett one. it is hard to explane - but if you open the sweepnurp - render normaly and then in octane you will see the different. see attach screencomp
but i still try to get the alpha chanel fixed. tried another on and there is nothing to see from the alpha in the c4d workspace - attach the logo from langnese
perfect in octane render but in the c4d workarea ist the red plate with no alpha.
do you have the problem?
cheers