static PaintContext InitializePaintContext(Terrain terrain, Rect bounds, int inputTextureWidth, int inputTextureHeight, RenderTextureFormat colorFormat)
{
PaintContext ctx = new PaintContext();
ctx.CalculateBrushRect(terrain, bounds, inputTextureWidth, inputTextureHeight);
ctx.CreateTerrainTiles(terrain, inputTextureWidth, inputTextureHeight);
ctx.CreateRenderTargets(colorFormat);
return(ctx);
}