If your mesh has overlapping UVs and you're using lightmaps this WILL happen. Either make sure your UVs don't overlap and fit in the 1:1 tile or set the lightmap resolution to 0 in the mesh editor which'll fall back to vertex lighting (not so great) If you want repeating textures but to keep the UVs in the 1:1 tile, do…
http://learnfobia.com/category-Maya-129/tutorial-Sprite-Based-Particle-Trees-2259.html Like this? Otherwise create plane and using an aim constraint with these settings: aimConstraint -offset 0 0 0 -weight 1 -aimVector 0 0 -1 -upVector 0 1 0 -worldUpType "vector" -worldUpVector 0 1 0 -skip x -skip z CAMERA GEOMETRY;
I've tested Corona, it does not support IOR < 1. Even though you can plug a bitmap in the IOR input, it looks like it's stuck to 1. The ior is mandatory for the conversion.. :/ In vray, the values bellow 1 represents 1/ior, allowing users to input a texture. Maybe you could ask the devs for that ? :) I'm downloading the…