Pink Club - texture paint mode peep

I had to shift to Texture paint mode to see a poster image (the Shader mode is impossible). When I created the 3D model it was a frontal view, but when appending it to the scene, the poster was lying horizontally. I wanted to put it on a wall and close the roof of that room, since it was finished. But no, I must see that I not put it facing the wall first. Well, it was lying with the front up (as espected but not ensured). However, when toggling Texture paint Blender got lazy again and I had to wait before I even could see the damn pic. Then I wanted to get a broader view of the whole scene and after maybe half an hour I could see this and took a print screen shot. All colors are darker than I expected and much, much darker than ingame. Something in between would be perfect if I can find the right light setting for the mod. I had to close Blender and restart my computer so now I'm having a short break. Just now I'm fine tuning details and have done some already. I'm about to put roofs on the small rooms and then take on the main hall. I wont work until 10 a.m. as yesterday though. I have a small candle burning and when it's ended it's bedtime. In about three hours or little more. It works well to do all in the easier Layout mode, if You know what will be shown. I can add materials and textures and then check the outcome ingame.